Posters

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



Purpose:

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.

Setting:

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

Methods:

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.

Results:

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).

Conclusions:

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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