Indian Journal of Ophthalmology

ORIGINAL ARTICLE
Year
: 2004  |  Volume : 52  |  Issue : 3  |  Page : 215--20

Retinal nerve fiber layer measurements in indian eyes using the scanning laser polarimeter, GDx.


L Vijaya, M Varma, R Krishna Kumar, AS Saraniya, G Babu, S Subash, B Sukumar 
 Department of Glaucoma and Optometry Vision Research Foundation, Medical Research Foundation, Chennai, India

Correspondence Address:
L Vijaya
Department of Glaucoma and Optometry Vision Research Foundation, Medical Research Foundation, Chennai
India

PURPOSE: To obtain retinal nerve fiber layer (RNFL) measurements in normal Indian subjects of different age groups; and to determine the differences between the right and the left eye of a subject and variations between male and female gender using the scanning laser polarimeter GDx. MATERIALS AND METHODS: Prospective cross-sectional study of 180 eyes of 94 subjects. The RNFL values were obtained with the nerve fiber analyser GDx using default quadrant positions supplied by the manufacturer. Fourteen parameters were studied. Of these 6 were average-based parameters (average thickness, superior maximum, inferior maximum, ellipse average, superior average, inferior average), 4 ratio-based parameters (symmetry, superior ratio, inferior ratio, superior/nasal), 4 �DQ�other�DQ� parameters (maximum modulation, number, ellipse modulation, superior integral). The main outcome measures were effect of age on RNFL values, comparison of males and females and the right and the left eye of a subject. RESULTS: There was a negative linear correlation with age. Three ratio-based parameters showed a statistically significant negative correlation with age. �DQ�Number�DQ� increased with age. Superior maximum, superior average, superior integral, symmetry and superior ratio were higher for the left eye. �SQ�Number�SQ� was higher for the right eye. Superior ratio and maximum modulation were more in females than males, no difference was noted with other parameters. CONCLUSION: There was a gradual decrease of RNFL values with increasing age - the superior quadrant values were higher for the left eye than the right eye, suggesting asymmetry. No significant differences were detected between males and females.


How to cite this article:
Vijaya L, Varma M, Krishna Kumar R, Saraniya A S, Babu G, Subash S, Sukumar B. Retinal nerve fiber layer measurements in indian eyes using the scanning laser polarimeter, GDx. Indian J Ophthalmol 2004;52:215-20


How to cite this URL:
Vijaya L, Varma M, Krishna Kumar R, Saraniya A S, Babu G, Subash S, Sukumar B. Retinal nerve fiber layer measurements in indian eyes using the scanning laser polarimeter, GDx. Indian J Ophthalmol [serial online] 2004 [cited 2024 Mar 29 ];52:215-20
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