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Optic disc size in ocular hypertension
G C Sekhar1, R Nagarajan, T J Naduvilath
1VST Center for Glaucoma Care, L.V. Prasad Eye Institute, Hyderabad, India. gcs@lvpeye.stph.net
Indian Journal of Ophthalmology
|July 13, 2000
Summary
Ocular hypertension (OHT) eyes have significantly smaller optic disc areas compared to primary open-angle glaucoma (POAG) and normal eyes. This finding aids in understanding glaucoma progression and diagnosis.
Area of Science:
- Ophthalmology
- Glaucoma Research
Background:
- Ocular hypertension (OHT) is a precursor to primary open-angle glaucoma (POAG).
- Optic disc size is a potential indicator in glaucoma diagnosis and progression.
Purpose of the Study:
- To compare optic disc size in eyes with OHT versus POAG and normal eyes.
- To investigate the diagnostic utility of optic disc morphometry in OHT.
Main Methods:
- Optic disc photographs from 28 OHT, 42 POAG, and 30 normal subjects were analyzed.
- Disc area was calculated using magnification-corrected morphometry (Littmann correction).
Main Results:
- The mean optic disc area in OHT was 9.47 +/- 1.09 mm2.
- POAG (12.27 +/- 2.87 mm2) and normal (12.11 +/- 2.83 mm2) eyes had significantly larger optic disc areas than OHT eyes (p < 0.0001).
Conclusions:
- Optic disc area in OHT is significantly smaller than in POAG and normal eyes.
- Magnification-corrected morphometry can differentiate OHT based on optic disc size.