الفهرس 
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Abstract
Retinal vein occlusion is one of the vascular disorders affecting vision. Branch retinal vein occlusion is three times more common than central retinal vein occlusion and is second only to diabetic retinopathy as the most common retinal vascular cause of visual impairment
Retinal vein occlusions (RVOs) are the second most common type of retinal vascular disorder after diabetic retinal disease. They can occur at almost any age (although typically in middle to later years - most in those aged over 65 years) and their severity ranges from asymptomatic to a painful eye with severe visual impairment.
The RNFL may, in fact, be a better indicator of optic nerve health, as studies have shown that RNFL thinning due to ganglion cell death precedes both measurable visual function loss and detectable changes in optic nerve appearance.
Damage of retinal nerve fiber layer caused by retinal ischemia is the cause of RNFL thinning in RVO, this results from systemic diseases, including diabetes, hypertension, carotid ischemia, and hematologic disorders that induce hypercoagulationor from the RVO it self or accompanying glaucoma.
The relationship between glaucoma and RVO has been reported Therefore, the relationship between the 2 diseases has important implications for patient care, as well as for determining possible common pathogenic mechanisms,
These results suggest that RVO and glaucoma may share systemic risk factors, reflecting a common pathogenic mechanism, in at least some patients.
This study aimed to assess retinal never fiber layer thickness after branch retinal vein occlusion.
This study showed that there was sectorial retinal nerve fiber layer thickness was decreased in the eyes of patients with unilateral BRVO, especially in the inferior and superior-temporal sectors, compared with other eyes.