Abstract

P 107

Correlation between corneal thickness, corneal diameter and optic disc size in in non-glaucomatous eyes

Michael Steppat, Ariane Boenisch, Eckart Schmidt, Eberhard Spörl, Andreas Böhm, Lutz Pillunat
Klinik und Poliklinik für Augenheilkunde, Universitätsklinikum Carl Gustav Carus, Dresden

Objective
To examine the correlation between corneal thickness, corneal diameter and optic disc size in non-glaucomatous eyes.
Methods
In a prospective clinical trial one randomly chosen eye of 252 healthy subjects (median age 42.5, range 16-86y; 59.9% female, 40.1% male) were examined. Before entering the study each patient received an ophthalmologic exam including evaluation of the optic disc. None of the subjects had signs or a history of glaucoma or ocular hypertension. Optic disc size was measured by HRT II, corneal diameter by keratometry (Auto Keratometer KM-500, NIDEK) and central corneal thickness by ultrasound pachymetry. For statistics Pearson’s correlation coefficents were calculated.
Results
Corneal diameter was statistically significant correlated to disc area (p>0.001, R= 0.263). There was no significant correlation between central corneal thickness and corneal diameter (p=0.839) and between corneal thickness and disc area (p=0.370). Age was negatively correlated to corneal diameter (p=0.001, R=-0.213). There was no correlation between age and corneal thickness (p=0.839).
Conclusions
Conclusions: In contrast to earlier studies in glaucoma patients, in our study in non-glaucomatous eyes corneal thickness does not correlate with optic disc diameter. However, we detected a correlation between optic disc diameter and corneal diameter which was not reported yet.

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