Optic disc topography of normal Indian eyes: an assessment using optical coherence tomography.
OBJECTIVE
To study the optic disc topographic measurements of normal Indian eyes using optical coherence tomography (OCT).


METHODS
One hundred and fifty eyes selected randomly from 150 normal Indian subjects of both sex and various age groups underwent optic disc imaging with the OCT using the fast optic disc protocol.


RESULTS
Mean +/- standard deviation of the optic disc topographic measurements were: disc area 2.63 +/- 0.55 mm 2 , cup area 0.87 +/- 0.45 mm 2 , neuroretinal rim area 1.78 +/- 0.55 mm 2 and cup to disc area ratio 0.33 +/- 0.15. There was no significant difference in the measurements between males and females. There was no significant correlation with respect to age and refractive errors ranging from -5.0 to +3.0 diopters of spherical equivalent.


CONCLUSIONS
Our study provides a normative database for the various optic disc topographic measurements and its variations with age, sex and refractive error in normal Indian eyes using OCT.
Dacosta
Shaun
S
The Eye Research Foundation, Vijaya Hospital, Chennai - 600 026, India. shaundacosta@yahoo.com
Bilal
Sheena
S
Rajendran
Babu
B
Janakiraman
P
P
D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D009898:Optic Disk / Q000033:anatomy & histology*; D012016:Reference Values; D041623:Tomography, Optical Coherence / Q000379:methods*; D055815:Young Adult