Dimensions of the foveal avascular zone using the Heidelberg retinal angiogram-2 in normal eyes.
Indian J Ophthalmol
;
2011 Jan; 59(1): 9-11
Article
in English
| IMSEAR
| ID: sea-136130
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 andMethods:
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 mm2 (±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 mm2 (±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.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Reference Values
/
Retinal Vessels
/
Female
/
Humans
/
Male
/
Capillaries
/
Fluorescein Angiography
/
Adult
/
Young Adult
/
Fovea Centralis
Type of study:
Observational study
Language:
English
Journal:
Indian J Ophthalmol
Year:
2011
Type:
Article
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