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Intravitreal injection is a treatment in which medication is injected directly into the vitreous humor to treat retinal diseases, improve vision, and control retinal swelling or leakage. The procedure begins with an eye evaluation, followed by sterilization and local anesthesia. The ophthalmologist then precisely injects the medication into the vitreous and monitors the eye afterward for safety. Intravitreal injections deliver medication directly to the retina, providing rapid and targeted effects. The procedure is minimally painful, safe, and usually does not require hospital admission. Intravitreal injection is an effective and safe treatment for retinal diseases. It involves injecting medication directly into the vitreous cavity of the eye, allowing the drug to act quickly and precisely at the affected area. Understanding the procedure can help patients feel more confident and prepared for treatment.     What Is Intravitreal Injection? Intravitreal injection is a medical procedure used to treat various retinal and vitreous conditions. The ophthalmologist injects medication directly into the vitreous cavity located in the center of the eye so the medication can work rapidly and precisely. It is commonly used for conditions such as age-related macular degeneration (AMD), diabetic retinopathy, abnormal retinal blood vessels, retinal bleeding, and swelling.   The advantage is that the medication acts directly at the site of disease without extensive systemic circulation, reducing side effects. However, the procedure must be performed in a sterile environment by an ophthalmologist to prevent infection or complications such as inflammation or temporary increased eye pressure.   Who Is Intravitreal Injection Suitable For? This treatment is suitable for individuals with retinal conditions caused by abnormal blood vessels, including:   Diabetic Retinopathy, particularly diabetic macular edema, where damaged retinal blood vessels leak fluid or blood, causing blurred or distorted vision. Without treatment, permanent vision loss may occur. Wet Age-Related Macular Degeneration (Wet AMD), characterized by abnormal blood vessel growth under the retina that leaks fluid or blood, leading to central vision impairment. Early treatment, such as anti-VEGF injections, can slow disease progression. Retinal Vein Occlusion, where blockage of retinal veins causes fluid leakage, blurred vision, and potential long-term complications if untreated.   Intravitreal Injection Procedure The procedure is quick and usually painless due to local anesthesia. Steps include:   Local anesthetic eye drops are applied, and the eye area is disinfected to prevent infection. The ophthalmologist uses a small instrument to keep the eyelids open and injects medication through the sclera using a very fine needle. The injection takes only a few seconds. The eye is re-examined afterward, and post-treatment care instructions are provided. Benefits of Intravitreal Injection Intravitreal injections are highly effective because the medication targets the retina directly, providing fast and precise results. The procedure is minimally invasive, takes only minutes, involves little discomfort, and patients can usually return home immediately. It is considered a global standard treatment with a high safety profile.     Post-Injection Precautions Proper post-injection care helps reduce side effects and promotes faster recovery:   Avoid rubbing or scratching the eyes for at least 3–5 days to prevent infection. Avoid getting water into the eyes for 2–3 days; use a damp cloth instead of washing the face directly. Use prescribed eye drops exactly as directed and wash hands before and after application. Get adequate rest and avoid prolonged screen use. Avoid heavy lifting, strenuous exercise, or bending the head downward during the first week. Avoid swimming or exposure to potentially contaminated water to reduce infection risk. Medications Used for Intravitreal Injection In addition to advanced retinal surgery, Bangkok Eye Hospital utilizes Anti-VEGF medications to inhibit abnormal blood vessel growth and reduce retinal swelling, which are key causes of blurred vision in diabetic retinopathy and age-related macular degeneration. Common internationally recognized medications include Lucentis and Eylea.   To provide effective and cost-efficient treatment, Bangkok Eye Hospital primarily uses Avastin and Vabysmo, each offering specific advantages depending on the patient’s condition.   Avastin Avastin is widely used worldwide due to its effectiveness and affordability, making long-term treatment more accessible for patients.   Vabysmo Vabysmo represents a newer innovation using dual-pathway technology that inhibits both VEGF and Ang-2 proteins, reducing inflammation and abnormal vessel fragility. It often provides longer-lasting retinal dryness and may reduce the frequency of injections.   At Bangkok Eye Hospital, retinal specialists carefully evaluate each patient to determine the most suitable medication based on eye condition and lifestyle, ensuring safety and optimal visual outcomes.     Why Choose Intravitreal Injection at Bangkok Eye Hospital? Bangkok Eye Hospital provides comprehensive retinal care with advanced technology and experienced retinal specialists. Services include detailed eye examinations, modern surgical techniques, intravitreal injections, close post-treatment follow-up, personalized treatment guidance, and comfortable care throughout the treatment process.   Summary Intravitreal injection is an effective treatment for retinal diseases such as diabetic macular edema, wet AMD, and other vascular retinal conditions. The procedure is quick, minimally painful due to local anesthesia, and allows medication to act directly on the retina for rapid results. Patients typically go home the same day without hospitalization. For comprehensive retinal care, visit Bangkok Eye Hospital.   Related Articles Recognizing Retinal Swelling Symptoms Retinal Hole Causes and Treatment Subconjunctival Hemorrhage: Causes and Treatment Frequently Asked Questions (FAQ) Common questions about intravitreal injections to help patients better understand this treatment.   How many injections are needed? The number of injections depends on the disease type and severity. Some patients may require a single injection, while others need repeated treatments as advised by their ophthalmologist.   How much does an intravitreal injection cost? Costs vary depending on the medication type, disease severity, number of injections required, and retinal condition. Consultation with an ophthalmologist is recommended for accurate pricing.   How long does recovery take? Vision improvements may begin within 1–2 weeks after injection, though recovery varies depending on individual response and disease severity. Follow-up treatments may be necessary.

Dry eye syndrome occurs when the eyes produce insufficient tears or poor-quality tears, leading to dryness, irritation, discomfort, or visual disturbance. Common vision problems include myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and presbyopia. Vitreous degeneration refers to changes in the eye’s vitreous gel becoming more liquid or forming clumps, causing floaters. Macular degeneration involves deterioration of the central retina, leading to distorted, blurred vision and possible vision loss. Cataracts cause clouding of the eye’s lens and blurred vision; glaucoma results from increased eye pressure damaging the optic nerve and risking vision loss; pterygium is degeneration of conjunctival tissue that may cause blurred vision or increased astigmatism; pinguecula is a similar conjunctival growth that does not extend onto the cornea. We rely on our eyes constantly to observe the world around us, which places significant strain on them and increases the risk of eye problems. Understanding common eye diseases and vision conditions helps us care for and protect our eyes properly, recognize early symptoms, and seek timely treatment to reduce the risk of future complications.     Dry Eye Syndrome Dry eye syndrome occurs when the eyes cannot produce enough quality tears, leading to irritation, burning sensations, foreign body sensation, or excessive tearing. Common causes include prolonged screen use, dry or windy environments, and extended contact lens wear. Relief and prevention include using artificial tears, resting the eyes regularly, blinking frequently, and avoiding dry environments.     Refractive Vision Problems Refractive errors are among the most common vision issues across all age groups. They occur when light entering the eye fails to focus precisely on the retina, resulting in blurred vision. Types include:   Myopia (Nearsightedness) Myopia occurs when the cornea is too curved or the eyeball is elongated, causing light to focus in front of the retina. This results in clear near vision but blurred distance vision. People may squint or strain their eyes to see clearly and sometimes experience headaches.   Genetics plays a major role, especially if parents are myopic. Prolonged near work, limited outdoor activity, and excessive screen use can worsen symptoms.   Hyperopia (Farsightedness) Hyperopia may occur from birth or develop with age, resulting in difficulty focusing on near objects.   Congenital Farsightedness Occurs when the cornea is too flat or the eyeball is shorter than normal, causing light to focus behind the retina. Individuals typically see distant objects clearly but struggle with near vision. It is often hereditary.   Presbyopia Presbyopia results from aging as the eye’s lens stiffens and loses flexibility, reducing focusing ability. Symptoms include difficulty reading small print, eye strain, headaches, sensitivity to light, and reduced night vision.   Astigmatism Astigmatism occurs when the cornea has an irregular shape, causing multiple focal points instead of one. Symptoms include eye strain, blurred or distorted vision, glare sensitivity, and difficulty seeing at night.   Causes may include congenital corneal irregularities, injury, eye surgery, or conditions such as keratoconus.   Vitreous Degeneration The vitreous is a clear gel filling the back of the eye. Vitreous degeneration occurs when the gel liquefies or forms clumps, leading to floaters or flashes of light.   It commonly occurs with aging, especially after age 50 or in individuals with myopia. Untreated cases may increase the risk of retinal tears or detachment.   Common Eye Diseases Eye diseases can significantly affect vision if not properly diagnosed and treated. Understanding symptoms and treatments helps protect eye health.   Cataracts Cataracts occur when the eye’s lens becomes cloudy, reducing light transmission and gradually impairing vision. Common in older adults but may occur in younger individuals due to steroid use, trauma, or inflammation.   Glaucoma Glaucoma involves optic nerve damage often linked to high eye pressure. Acute cases may cause pain, blurred vision, halos around lights, headache, nausea, or vomiting, while chronic glaucoma may progress silently.   Pterygium and Pinguecula Pterygium is degeneration of conjunctival tissue growing toward the cornea, potentially causing blurred vision or astigmatism. Pinguecula is similar but does not invade the cornea.     Age-Related Macular Degeneration Age-related macular degeneration (AMD) affects the central retina, usually in individuals over 60, though increasingly seen earlier. It may cause distorted central vision, blurring, or dark spots.   While not curable, progression can be slowed through regular screening, healthy lifestyle habits, UV protection, balanced nutrition, exercise, weight control, and avoiding smoking.   Why Get Eye Checkups at Bangkok Eye Hospital? Bangkok Eye Hospital provides comprehensive eye care using advanced technology and experienced ophthalmologists across specialties. Services include detailed diagnosis, treatment, follow-up care, personalized consultation, and a comfortable treatment environment.   Summary Regular eye care is essential. Annual eye examinations help detect abnormalities early. Adequate rest, balanced nutrition rich in vitamins A and C, and proper visual habits support eye health. Visit Bangkok Eye Hospital for comprehensive eye care services.   Related Articles LASIK for Myopia: Preparation and Benefits Glaucoma Treatment and Prevention Understanding Retinitis: Causes and Treatment Frequently Asked Questions (FAQ) Common questions about eye health and vision problems to help patients better understand prevention and treatment.   How should older adults care for their vision? Regular eye exams at least annually, adequate rest, hydration, balanced diet rich in antioxidants, avoiding smoking, and controlling blood sugar are important preventive measures.   How can vision problems in children be prevented? Encourage regular breaks during near work, limit screen time, promote outdoor activities, ensure adequate lighting, and schedule regular eye examinations.   What should I do if I experience dizziness or blurred vision? Consult an ophthalmologist for eye examination, adjust glasses or contact lenses if necessary, rest your eyes regularly, and avoid bright glare. Seek immediate medical attention if symptoms worsen.

Patients who may require retinal surgery include those with retinal detachment, severe diabetic retinopathy, macular holes, epiretinal membranes, or vitreous hemorrhage. Main retinal surgery techniques include vitrectomy, which removes cloudy or blood-filled vitreous gel while repairing the retina using laser treatment, gas injection, or silicone oil; another method is scleral buckling, which supports the retina externally to help it reattach to the eye wall. Technologies used in retinal surgery include micro-surgical instruments, surgical microscopes, intraocular laser systems, silicone oil or gas tamponade, and OCT imaging to assess retinal damage in detail. Retinal surgery is a complex and important treatment for patients with severe eye conditions such as retinal tears, detachment, or advanced retinal degeneration. Without timely treatment, these conditions may lead to permanent vision loss. Understanding surgical procedures, technologies used, and treatment indications can help reduce anxiety and allow patients and families to prepare physically and emotionally. Strict adherence to pre- and post-operative instructions also improves recovery outcomes and reduces the risk of complications.     Who Needs Retinal Surgery? Retinal surgery is considered when retinal damage becomes severe and cannot be effectively treated with other methods. Conditions requiring surgery include:   Retinal Detachment Retinal detachment is an ophthalmic emergency where the retina separates from underlying tissue, disrupting visual function. Without prompt treatment, permanent vision loss may occur. Symptoms include flashes of light, floaters, a dark curtain over part of vision, or blurred sight. Early diagnosis and surgical treatment by an ophthalmologist are essential.   Macular Degeneration Macular degeneration, especially wet AMD, involves abnormal blood vessel growth beneath the retina. These fragile vessels may leak blood or fluid, causing central vision distortion, blurring, or dark spots.   The disease can progress rapidly. Treatments such as anti-VEGF injections, laser therapy, or retinal surgery may slow progression and preserve vision.   Diabetic Retinopathy Diabetic retinopathy results from chronic high blood sugar damaging retinal blood vessels, leading to leakage, swelling, or bleeding. This causes blurred vision and, if untreated, permanent vision loss.   Treatment includes blood sugar control, laser therapy, intraocular injections, or retinal surgery depending on severity. Regular eye exams are essential for early detection.   Macular Hole A macular hole is a small defect in the central retina responsible for detailed vision. It may cause distorted central vision while peripheral vision remains normal.   Common causes include aging, vitreous traction, or eye injury. Surgery is often required to close the hole and improve vision.   Epiretinal Membrane Epiretinal membrane is a thin scar tissue layer on the retinal surface, often affecting the macula. It can distort vision, causing curved lines or double vision.   Mild cases may not require treatment, but severe cases affecting daily life may require surgical removal.   Vitreous Hemorrhage Vitreous hemorrhage occurs when blood leaks into the vitreous gel, causing hazy or dark vision. Severe cases may significantly impair vision.   Common causes include diabetic retinopathy, retinal tears, trauma, or abnormal retinal vessels. Treatment ranges from observation to laser therapy or vitrectomy surgery.     Preparing for Retinal Surgery Proper preparation helps reduce complications and supports faster recovery.   Consult your ophthalmologist thoroughly and disclose medical history, medications, and chronic conditions. Preoperative tests may include blood tests or ECG. Inform your doctor about all medications. Some drugs affecting blood clotting may need temporary discontinuation. Fasting for at least 6–8 hours before surgery is typically recommended. Arrange transportation and a caregiver for post-operative support due to temporary blurred vision. Retinal Surgery Procedures Retinal surgery involves various techniques depending on disease type and severity.   Vitrectomy This procedure uses very fine instruments inserted through small incisions in the white of the eye. The surgeon removes cloudy or blood-filled vitreous gel, treats underlying retinal conditions with laser therapy, and may inject gas or silicone oil to help reattach the retina. Dissolvable sutures close the incisions.   Scleral Buckling This technique places a silicone band or sponge on the outer eye wall to support retinal reattachment. It is commonly used for retinal detachment caused by tears.   The material typically remains permanently without complications. Some patients may require fluid drainage beneath the retina. Temporary redness or blurred vision may occur initially.     Technology Used in Retinal Surgery Modern retinal surgery combines surgical skill with advanced medical technology for improved safety and precision.   Micro-instruments: Extremely small surgical tools minimize incision size and speed recovery. Surgical microscope: Provides magnified visualization of delicate retinal structures. Endolaser: Treats abnormal vessels or seals retinal tears internally. Silicone oil or gas: Helps press the retina back into position during healing. OCT imaging: Provides detailed retinal scans before and after surgery. Postoperative Care Guidelines Proper self-care after surgery improves recovery and reduces complications.   If gas or silicone oil is injected, patients may need specific positioning such as face-down or side-lying. Use prescribed eye drops exactly as directed. Avoid water exposure to the eye during the first week and refrain from rubbing the eye. Avoid air travel if gas is present due to pressure changes. Avoid heavy lifting, strenuous activity, and contact sports. Rest adequately and limit intensive visual tasks. Expected Results and Recovery Time Retinal surgery helps correct abnormalities and prevent future vision loss. Outcomes depend on disease severity. Some patients see improvement quickly, while others may take months. Typical recovery lasts about 1–2 weeks, with activity restrictions during healing.   Cost of Retinal Surgery Costs vary based on surgical technique, technology, and individual treatment needs. Fees typically include surgeon costs, operating room charges, medications, and intraocular lens expenses if required.   Retinal Surgery Technology at Bangkok Eye Hospital Bangkok Eye Hospital utilizes advanced PPV (Pars Plana Vitrectomy) technology with the Constellation Vision System, internationally recognized for treating complex retinal conditions such as detachment, diabetic retinopathy, and macular disorders.   The ULTRAVIT® vitrectomy cutter operates at extremely high speeds, allowing gentle vitreous removal with minimal retinal traction. Intelligent intraocular pressure control maintains stable eye pressure throughout surgery, reducing complication risks.   High-resolution Xenon illumination enhances visualization of delicate retinal tissue, while PurePoint® endolaser technology precisely treats tears or abnormal vessels. These integrated technologies allow comprehensive retinal repair in a single procedure.   Small-gauge surgery results in tiny self-sealing incisions, minimizing irritation and accelerating recovery. Postoperative positioning may still be necessary if gas or silicone oil is used.   Why Choose Retinal Surgery at Bangkok Eye Hospital? Bangkok Eye Hospital provides comprehensive retinal surgery services using advanced technology and experienced specialists from the Retina Center. Patients receive:   Comprehensive eye examinations for precise treatment planning. Advanced technologies such as micro-surgery tools, laser therapy, and OCT imaging. Close postoperative monitoring and rehabilitation support. Personalized treatment advice tailored to lifestyle and eye condition. Comfortable care throughout surgery and recovery. Summary Retinal surgery is essential for conditions such as retinal detachment, macular holes, or diabetic retinopathy. Modern techniques including vitrectomy and scleral buckling, supported by advanced technology, enhance safety and treatment outcomes. Patients should follow preoperative instructions, arrange post-surgical care, and attend follow-up appointments. Recovery typically takes 1–2 weeks depending on severity. Consult Bangkok Eye Hospital for comprehensive retinal care.   Related Articles What Causes Retinal Holes? Symptoms and Treatment Options Signs of Retinal Swelling You Should Not Ignore Diabetic Retinopathy Symptoms and Prevention Frequently Asked Questions (FAQ) Common questions about retinal surgery to help patients prepare confidently.   What symptoms occur after retinal surgery? Temporary blurred vision, mild irritation, tearing, floaters, or flashes may occur. Severe pain or worsening vision should be reported immediately.   How long is hospitalization required? Typically 1–2 days depending on surgical complexity and patient condition.   Why must patients lie face-down after surgery? Face-down positioning helps gas or silicone oil support retinal reattachment, improving healing and visual outcomes.

Retinal laser treatment uses a laser beam directed at abnormal areas of the retina to prevent detachment, tears, or retinal damage while helping preserve visual performance. Retinal laser therapy helps treat abnormal blood vessels caused by diabetic retinopathy, retinal tears or holes, macular edema, and retinal vascular occlusions to prevent permanent vision loss. The advantages of retinal laser treatment include safety, quick results, no major surgery, no hospitalization required, and effective prevention of vision loss. Laser treatment for retinal diseases represents an important medical advancement, especially for patients facing vision-threatening conditions. Retinal laser technology acts as a precise tool that helps repair and protect the retina from potential damage, preserving remaining vision from further deterioration. If you are considering this treatment, understanding the procedure, benefits, and safety aspects will help you make a confident decision.   What Is Retinal Laser Treatment? Retinal laser treatment involves directing a concentrated laser beam to specific areas of the retina. The laser energy creates a controlled coagulation of tissue, helping stop damage and prevent disease progression. It also forms small scars on the retinal surface to reduce abnormal blood vessel growth. This makes it an important treatment option for conditions such as retinal bleeding or vascular blockage, particularly in diabetic retinopathy patients.   What Conditions Can Retinal Laser Treat? Retinal laser therapy is used to treat various retinal diseases and abnormalities that commonly affect vision, including:   Diabetic Retinopathy Complications from diabetes can cause abnormal retinal blood vessels, leading to fragile new vessel growth or swelling in the macula (macular edema). Partial retinal laser treatment helps seal leaking vessels and inhibit abnormal vessel growth, reducing swelling and preventing retinal bleeding.   Retinal Tears or Holes When the retina develops a tear, fluid from the vitreous may seep underneath, leading to retinal holes or detachment, which can result in permanent blindness if untreated. Retinal laser therapy acts like welding, sealing the edges of the tear to underlying tissue to prevent fluid leakage and protect vision.   Retinal Vein Occlusion When retinal veins become blocked, blood and fluid may leak into the retina, causing swelling and blurred vision. Retinal laser treatment helps reduce swelling, minimize fluid leakage, and prevent permanent retinal damage, improving vision clarity and lowering the risk of vision loss.   Retinal Laser Treatment Procedure Many patients may worry about pain or risks, but retinal laser treatment is generally safe, takes about 10–20 minutes per session, and does not require hospitalization. The procedure typically includes:   An ophthalmologist performs a detailed eye examination and may dilate the pupils for better visibility. Local anesthetic drops are applied, and a special contact lens is placed on the eye to clearly visualize the retina. The patient sits comfortably while the doctor uses a laser device attached to a microscope to carefully direct laser light to targeted retinal areas. Patients may see brief flashes of light or feel slight pricking sensations, but significant pain is uncommon. After treatment, temporary blurred vision may occur due to pupil dilation. Patients are advised to have someone accompany them home as vision may still be unclear. Advantages of Retinal Laser Treatment Retinal laser therapy effectively addresses retinal problems with precision, safety, and rapid results, offering both confidence and convenience. Key advantages include:   Modern laser technology provides high precision, allowing doctors to control laser position and energy accurately without damaging surrounding tissue. Non-invasive treatment without major surgery or incisions results in lower risks and shorter recovery time. A proven standard method effective in preventing vision loss in many retinal conditions. Timely laser treatment helps reduce the risk of disease progression that could otherwise require more complex surgery. Post-Treatment Care After Retinal Laser Proper self-care after retinal laser treatment is important for vision recovery and preventing complications. Patients should follow their doctor’s instructions carefully for optimal results.   Rest your eyes and avoid prolonged screen use or reading immediately after treatment. Use prescribed eye drops or anti-inflammatory medications exactly as directed. Seek medical attention if severe eye pain, redness, floaters, flashing lights, or swelling occurs. Avoid heavy lifting, strenuous activity, or sports that may impact the eyes initially. Attend follow-up appointments to monitor recovery and treatment effectiveness. Recovery Period and Expected Results During the first 1–2 days after retinal laser treatment, patients may experience mild blurred vision, light flashes, or slight redness due to dilating drops. These symptoms usually resolve gradually. Long-term, the main goal is preserving remaining vision and preventing further damage. Vision improvement may take weeks or months depending on the condition treated.   Cost of Retinal Laser Treatment The cost of retinal laser treatment varies depending on the disease type, severity, number of sessions, and equipment used. Typically, costs include physician fees, equipment, and medications.   Types of Lasers Used for Retinal Treatment To better understand treatment effectiveness at Bangkok Eye Hospital, retinal laser types can be categorized as follows:   1. Argon Laser / Green Laser (Photocoagulation) This widely used laser emits green light with strong thermal energy. Doctors use it to create tiny burns on the retina to seal tears or perform pan-retinal photocoagulation (PRP) for diabetic retinopathy to inhibit abnormal vessel growth.   2. Micropulse Laser (Sub-threshold Laser) This modern laser technology delivers energy in short pulses, allowing treatment without damaging surrounding tissue or leaving visible scars. It is commonly used for macular edema or subretinal fluid conditions by stimulating retinal cells to function normally.   3. Endolaser (Integrated with Constellation) This laser is used during surgery through a Constellation system. Heat from the probe tip is precisely directed to the treatment site. It is suitable for complex retinal detachment cases or when vitreous hemorrhage prevents external laser treatment.   4. YAG Laser Although commonly used for glaucoma or posterior capsule opacification, ophthalmologists may occasionally use YAG lasers to manage specific ocular membranes or deposits affecting the retina.     Why Choose Retinal Laser Treatment at Bangkok Eye Hospital Retina Center? Retinal laser treatment provides targeted, effective care to prevent retinal damage and stabilize vision. Bangkok Eye Hospital is committed to advanced technology and specialist ophthalmologists from the Retina Center to care for your vision. Services include:   Comprehensive retinal examinations for accurate treatment planning. Precision laser therapy targeting specific retinal areas to prevent leakage and halt disease progression. Close monitoring of visual recovery with guidance to prevent complications. Summary Retinal laser treatment effectively addresses retinal diseases and abnormalities, preventing tears, detachment, and vision deterioration. It is safe, quick, and requires minimal recovery time. Common indications include diabetic retinopathy, retinal swelling, and retinal vein occlusion. The treatment seals leaking vessels and prevents further damage. Mild temporary blurred vision may occur, but hospitalization is not required. Each session usually lasts 10–20 minutes with close follow-up care available at Bangkok Eye Hospital.   Related Articles What Causes Retinal Holes? Symptoms, Treatment, and When to See a Doctor Retinal Tears and Detachment: Symptoms, Causes, and Treatments Vitreous Degeneration: Causes, Risks, and Treatment Options Frequently Asked Questions (FAQ) This section answers common questions about retinal laser treatment, expected outcomes, and post-treatment care.   What symptoms occur after retinal laser treatment? Patients may experience mild blurred vision, light flashes, or redness from dilating drops. These usually resolve within 1–2 days. Vision improvement may take several weeks depending on the retinal condition treated.   What are the side effects? Side effects are typically mild, including temporary blurred vision, eye irritation, glare, or redness. Severe complications are rare but may include increased floaters or retinal damage. Doctors provide close follow-up to minimize risks.   How many sessions are required? The number of sessions depends on the disease type, severity, and treatment area. Some patients need only one session, while others may require multiple treatments based on the ophthalmologist’s recommendation.

Double vision is a condition in which a single object appears as two images simultaneously. It can result from abnormalities of the eyes, eye muscles, lenses, or certain parts of the nervous system. The causes of double vision may involve dysfunction of the eye muscles, eye lenses, optic nerves, or the brain. Treatment depends on the underlying cause and may include corrective glasses, eye muscle exercises, treatment of the primary disease, or surgery in some cases, as advised by a physician. Double vision (Diplopia) is a visual problem that occurs when images from both eyes fail to merge properly, causing objects to appear duplicated. This condition can interfere with daily activities such as reading, driving, and walking, and may compromise safety. Understanding the causes and undergoing early diagnosis can lead to more accurate and effective treatment.     What Is Double Vision? Double vision, or diplopia, refers to seeing one object as two. This condition can be highly disruptive to daily life, affecting activities such as driving, reading, and even walking, and may cause dizziness or balance problems.   Double vision can be classified into two main types:   Monocular DiplopiaDouble vision persists even when the unaffected eye is closed, indicating that the problem originates within one eye. Binocular DiplopiaDouble vision disappears when either eye is closed, suggesting that the issue arises from misalignment or coordination problems between both eyes.     Causes of Double Vision Double vision does not have a single cause and may result from various factors, depending on the type and characteristics of the symptom.   Causes of Monocular Diplopia This type is usually caused by structural problems within the eye itself, such as the cornea, lens, or retina, and is typically not related to eye muscles or nerves controlling eye movement.   Cataracts Cataracts occur when the normally clear lens becomes cloudy, causing light to scatter before reaching the retina. This results in blurred or double vision that gradually worsens with age.   Corneal Abnormalities Corneal edema occurs when fluid accumulates in the cornea, causing swelling and cloudiness that impair vision and may lead to double vision. Corneal scars or ulcers caused by infection or injury can alter light refraction and result in double vision. Keratoconus is a condition in which the cornea gradually thins and bulges into a cone shape, causing irregular refraction and visual distortion.   Refractive Errors and Lens Issues Astigmatism occurs when the cornea has an irregular curvature, leading to distorted or duplicated images.   In patients who have undergone cataract surgery, displacement or malfunction of an intraocular lens may also cause double vision.   Causes of Binocular Diplopia Binocular diplopia often indicates more serious problems involving the eye muscles, the nerves controlling eye movement, or the brain, and requires prompt evaluation.   Eye Muscle Disorders Each eye is controlled by six extraocular muscles. Weakness or poor coordination among these muscles can prevent both eyes from moving synchronously.   Examples include: Graves’ DiseaseThis condition causes inflammation and swelling of the eye muscles, leading to abnormal eye movement.   Myasthenia GravisAn autoimmune disorder that causes muscle weakness throughout the body, including the muscles controlling eye movement, resulting in strabismus and double vision.   Optic and Cranial Nerve Disorders Cranial nerves III, IV, and VI control eye movement. Damage to these nerves due to disease or injury can disrupt eye alignment.   Common causes include:   Diabetes, which can damage nerves supplying the eye muscles Multiple Sclerosis (MS), a central nervous system disorder that damages nerve coverings and disrupts nerve signaling Stroke, which may suddenly affect the nerves controlling eye movement and cause acute double vision Brain-Related Causes The brain processes visual signals from both eyes. Any abnormality affecting this process can result in double vision, including:   Brain tumors that compress visual or motor nerves Aneurysms, where bulging blood vessels press on ocular nerves Traumatic brain injury, which may damage areas of the brain responsible for vision     Diagnostic Process for Double Vision Early consultation with an ophthalmologist is essential for accurate diagnosis and appropriate treatment. Diagnostic steps include:   1. Medical History The ophthalmologist will assess symptom onset, frequency, whether double vision resolves when one eye is closed, the direction of image separation (horizontal or vertical), associated symptoms such as headache or dizziness, history of head injury, and underlying medical conditions.   2. Clinical Examinations A comprehensive eye examination is performed, including visual acuity testing, corneal and lens evaluation, and assessment of eye muscle function.   Blood tests may be ordered to detect systemic conditions such as diabetes or thyroid disease.If a neurological cause is suspected, CT scan or MRI imaging may be recommended to evaluate the brain and cranial nerves.     Treatment Approaches for Double Vision Treatment depends on identifying and addressing the underlying cause. Options include:   Treating underlying medical conditions such as diabetes or thyroid disease Prism glasses to help align images in cases of binocular diplopia caused by eye muscle imbalance Botulinum toxin injections to relax overactive eye muscles in certain cases of strabismus Cataract surgery with lens replacement when cataracts are the cause Surgical intervention in selected cases, such as severe strabismus or tumors Precautions and Additional Recommendations In addition to treatment, proper self-care can help prevent symptom worsening and complications.   Do not ignore symptoms, even if they are temporary Control underlying conditions such as diabetes or hypertension Ensure adequate rest and reduce prolonged eye strain when possible     Why Choose Bangkok Eye Hospital for Double Vision Treatment? Bangkok Eye Hospital offers comprehensive eye care supported by advanced technology and experienced specialist ophthalmologists. Services include:   Professional consultation and personalized treatment planning International-standard diagnostic and treatment equipment Comprehensive care from diagnosis through follow-up Summary Double vision can result from various causes, ranging from eye muscle disorders and lens abnormalities to optic nerve and brain-related conditions. Diagnosis involves thorough history-taking, eye examinations, and sometimes blood tests or imaging such as CT or MRI. Treatment depends on the cause and may include vision correction, medication, or surgery. Preventive care, including regular eye rest and avoiding excessive eye strain, is important. Patients experiencing double vision should seek evaluation from specialist ophthalmologists at Bangkok Eye Hospital for accurate diagnosis and effective treatment.   Related Articles What Causes a Retinal Hole? Symptoms and When to See a Doctor Recognizing Macular Edema: Warning Signs You Should Not Ignore Is a Burst Blood Vessel in the Eye Dangerous? Symptoms and Treatment Frequently Asked Questions About Double Vision (FAQ) Why Do I See Double Vision When Using My Phone? This is commonly caused by eye muscle fatigue or astigmatism, which affects focusing accuracy during prolonged screen use. Dry eye and excessive eye strain can also cause temporary double vision. Persistent or worsening symptoms should be evaluated by an ophthalmologist.   Is Double Vision Dangerous? Double vision may be harmless if caused by temporary eye strain, but frequent or sudden onset—especially with symptoms such as headache, dizziness, or after head injury—may indicate serious conditions involving the eyes, nerves, or brain and requires immediate medical evaluation.   What Causes Double Vision at Distance? Double vision when viewing distant objects is often related to eye muscle imbalance, lens abnormalities, or displacement of an intraocular lens. In some cases, neurological or brain-related issues may be involved. A comprehensive eye examination is recommended to determine the exact cause.