Macular edema associated with branch retinal vein occlusion: Optical coherence tomography angiography and fluoresecein angiography features

Poster Details

First Author: C.Monia TUNISIA

Co Author(s):    O. Meriem   S. Hela   K. Amine   M. Insaf   B. Jihen                 

Abstract Details


To quantify the foveal avascular zone (FAZ) area in eye with macular edema asociated to branch retinal vein occlusion (BRVO) and compared with the follow eye using OCT-Angiography.


Ophthalmology department Habib Thameur hospital, 8 street Ali Ben Ayed Montfleury 1008 Tunis, TUNISIA.


In this prospective observational case series, 9 patients with unilateral BRVO involving the macula were enrolled. All patients underwent ophthalmic examination including best-corrected visual acuity (BCVA), fluorescein angiography (FA), Swept-source OCT (SS-OCT) and OCT-Angiography (OCT-A) of BRVO eyes and their follow eyes as control group. FAZ area was quantified and microvascular abnormalities were analyzed in both superficial capillary plexus and deep capillary plexus on OCT-A using 4,5 x 4,5 mm angiograms.


The mean age of patients was 55.86 (± 9.06) years. Eight eyes had cystoid macular edema and 7 eyes had ellipsoid zone (ZE) disruption on SS-OCT. Capillary non-perfusion on OCT-A was seen in 7 eyes and significantly correlated with poor visual acuity (p=0.01). Retinal capillary network abnormalities were seen in deep capillary plexus of 4 eyes and in superficial capillary plexus of 5 eyes. Collaterals appeared in only one eye. Vascular tortuosity appeared in deep capillary plexus of 7 eyes and in superficial capillary plexus of 6 eyes. There was not any microvascular abnormality in fellow eyes. Mean FAZ area was 608,047 µm in BRVO eyes compared to 359.96 µm in healthy eyes. There was a significant correlation between FAZ area and poor visual acuity (p<0.001).


OCT-A is a non-invasive imaging technique that can help quantify FAZ enlargement and analyze microvascular abnormalities in BRVO eyes. It may be a good tool for diagnosis and follow-up and for establishing a functional prognosis in patients with macular edema.

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