Branch Retinal Vein Occlusion ?

Retina (back part of the eye) receives its blood supply through a single artery and vein called central retinal artery and vein respectively. This artery and vein or one of its branch can get blocked in some patients similar to stroke seen in brain or heart. This blockage could be in one of the branches (Branch retinal vein occlusion, BRVO) or may block the central vein itself (Central retinal vein occlusion, CRVO). Any blockage in the branch of the vein leads to blockage of the exit path of blood leading to a scenario similar to a traffic jam. Due to this blockage, the part of the vein involved becomes dilated and eventually may rupture leading to bleeding and swelling. This swelling gets collected at the center of retina called macula causing macular edema. This macular edema leads to decreased vision. The superotemporal branch of the vein is the most common branch to get blocked.

Retina (back part of the eye) receives its blood supply through a single artery and vein called central retinal artery and vein respectively. This artery and vein or one of its branch can get blocked in some patients similar to stroke seen in brain or heart. This blockage could be in one of the branches (Branch retinal vein occlusion, BRVO) or may block the central vein itself (Central retinal vein occlusion, CRVO). Any blockage in the branch of the vein leads to blockage of the exit path of blood leading to a scenario similar to a traffic jam. Due to this blockage, the part of the vein involved becomes dilated and eventually may rupture leading to bleeding and swelling. This swelling gets collected at the center of retina called macula causing macular edema. This macular edema leads to decreased vision. The superotemporal branch of the vein is the most common branch to get blocked.

Retina (back part of the eye) receives its blood supply through a single artery and vein called central retinal artery and vein respectively. This artery and vein or one of its branch can get blocked in some patients similar to stroke seen in brain or heart. This blockage could be in one of the branches (Branch retinal vein occlusion, BRVO) or may block the central vein itself (Central retinal vein occlusion, CRVO). Any blockage in the branch of the vein leads to blockage of the exit path of blood leading to a scenario similar to a traffic jam. Due to this blockage, the part of the vein involved becomes dilated and eventually may rupture leading to bleeding and swelling. This swelling gets collected at the center of retina called macula causing macular edema. This macular edema leads to decreased vision. The superotemporal branch of the vein is the most common branch to get blocked.

Retina (back part of the eye) receives its blood supply through a single artery and vein called central retinal artery and vein respectively. This artery and vein or one of its branch can get blocked in some patients similar to stroke seen in brain or heart. This blockage could be in one of the branches (Branch retinal vein occlusion, BRVO) or may block the central vein itself (Central retinal vein occlusion, CRVO). Any blockage in the branch of the vein leads to blockage of the exit path of blood leading to a scenario similar to a traffic jam. Due to this blockage, the part of the vein involved becomes dilated and eventually may rupture leading to bleeding and swelling. This swelling gets collected at the center of retina called macula causing macular edema. This macular edema leads to decreased vision. The superotemporal branch of the vein is the most common branch to get blocked.

Donec cursus at magna vel consequat. BRVO develops from a blood clot or decreased blood flow in the affected branch of central retina vein. BRVO can be caused by multiple factors. Age is the most important risk factor. The other risk factors associated with BRVO are Hypertension, Diabetes, Smoking, Glaucoma (Raised eye pressure) etc. The specific cause for the clot to form is unknown.

Donec cursus at magna vel consequat. BRVO develops from a blood clot or decreased blood flow in the affected branch of central retina vein. BRVO can be caused by multiple factors. Age is the most important risk factor. The other risk factors associated with BRVO are Hypertension, Diabetes, Smoking, Glaucoma (Raised eye pressure) etc. The specific cause for the clot to form is unknown.

BRVO is one of the leading retinal vascular diseases causing decreased vision after diabetic retinopathy. It is the most common type of vein occlusion followed by CRVO. It is commonly seen in patients with risk factors like hypertension, smoking, diabetes and old age.

BRVO leads to sudden decrease in vision. However, with adequate treatment patient has high probability of gaining good vision back. The recovery in vision depends on the underlying nerve cell damage and the duration of the disease.

BRVO generally presents as sudden painless decrease in vision in the acute stage. Some patients may have distorted / wavy vision where objects appear distorted. BRVO is not associated with pain. Some patients may develop new vessels which may lead to bleeding in the absence of treatment.

BRVO generally presents as sudden painless decrease in vision in the acute stage. Some patients may have distorted / wavy vision where objects appear distorted. BRVO is not associated with pain. Some patients may develop new vessels which may lead to bleeding in the absence of treatment.

BRVO generally presents as sudden painless decrease in vision in the acute stage. Some patients may have distorted / wavy vision where objects appear distorted. BRVO is not associated with pain. Some patients may develop new vessels which may lead to bleeding in the absence of treatment.

BRVO can be diagnosed clinically with the presence of retinal bleeding, swelling in the retina and dilated and tortuous vessels in the affected area. OCT helps to assess the extent of swelling of retina and also treatment response. FFA is occasionally required to look for new vessel formation.

BRVO is like a stroke of the eye where the blood vessel in the retina gets occluded partially or completely. It is important to identify the cause for this blockage so as to prevent the stroke in other eye or elsewhere in the body. Therefore, systemic workup in the form of blood tests like CBC, blood sugar, lipid profile, homocysteine levels is essential to identify the underlying pathology.

To answer the first question there is no fixed number of injections that are required. Each patient responds differently and the number of injections depends on how the eye responds to treatment. The treatment is to be continued till the patient shows visual improvement with reduction in swelling. I generally give an estimate of 3-4 injections as most patients need 3-4 injections to stabilize. However, some patient may need fewer injections and some patients may need more. The injections are usually given on 1 month intervals. The injection is given inside the white part of the eye and is not painful. You can resume your daily activities immediately following the injection with no additional restrictions post injection, no admission required.

To answer the second question, the aim of treatment is to decrease the swelling in the retina. Usually patients show good improvement in vision with treatment with some patients regaining near normal vision back. In patients who do not undergo adequate treatment or do not follow up regularly as advised, secondary complications may develop in the form of neovascularization. In such patients laser therapy may be required in addition to intravitreal injection.

To answer the first question there is no fixed number of injections that are required. Each patient responds differently and the number of injections depends on how the eye responds to treatment. The treatment is to be continued till the patient shows visual improvement with reduction in swelling. I generally give an estimate of 3-4 injections as most patients need 3-4 injections to stabilize. However, some patient may need fewer injections and some patients may need more. The injections are usually given on 1 month intervals. The injection is given inside the white part of the eye and is not painful. You can resume your daily activities immediately following the injection with no additional restrictions post injection, no admission required.

To answer the second question, the aim of treatment is to decrease the swelling in the retina. Usually patients show good improvement in vision with treatment with some patients regaining near normal vision back. In patients who do not undergo adequate treatment or do not follow up regularly as advised, secondary complications may develop in the form of neovascularization. In such patients laser therapy may be required in addition to intravitreal injection.

There is no cure for the occlusion in BRVO. Unlike in other strokes, we cannot lyse or remove the clot as the blood vessels in the retina are very narrow. The treatment is primarily aimed at preventing vision loss and treating any complications that may arise.