Dimensions of the Foveal Avascular Zone Using the Heidelberg Retinal Angiogram-2 in Normal Eyes

Overview

Journal Indian J Ophthalmol

Specialty Ophthalmology

Date 2010 Dec 16

PMID 21157065

Citations 15

Authors

Deepa John

Thomas Kuriakose

Suresh Devasahayam

Andrew Braganza

Affiliations

Soon will be listed here.

Abstract

Purpose: The purpose was to study the dimensions of the foveal avascular zone (FAZ) using Heidelberg Retinal Angiogram-2 (HRA-2; Heidelberg Engineering GmBH, Dossenheim, Germany).

Materials And Methods: An observational study of the FAZ area and circumference was done with fundus fluorescein angiography (FFA) using HRA-2 in 31 normal individuals. The FAZ was studied using both contrast-adjusted and nonadjusted methods. Contrast adjustment was done to obtain better visualization of the finer capillaries around the fovea enabling more precise measurements of the FAZ in normal eyes.

Results: The mean area of the FAZ calculated by the contrast-adjusted method was 0.2753 mm 2 (±0.074) and the mean circumference was 2.22 mm (±0.048). By the conventional method, the area and circumference of the FAZ were 0.6241 mm 2 (±0.177) and 3.23 mm (±0.454), respectively.

Conclusion: The measurements of area and circumference of FAZ using contrast-adjusted methods were significantly smaller than the conventional method.

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