Abstract
The objective of this study was to compare the measurement of the optic nerve of the glaucomatous neuroretinal rim areas by planimetry and simple ophthalmoscopy. Studied were 49 randomly selected glaucomatous eyes. Their planimetric measurements of the optic nerve head and the neuroretinal rim were compared with an ophthalmoscopic measurement derived from the projection of the Welch Allyn 5 degrees illuminated cone. Axial length of the eyes was determined. Utilizing regression equations, a correlation coefficient of 0.77 with a p value of < 0.0001 was obtained. The simple ophthalmoscopic estimation of the optic nerve head size and the neuroretinal rim size in glaucomatous patients compared well with the more laborious planimetric techniques and might be helpful in evaluating optic nerve heads for glaucomatous abnormalities.
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