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Am J Ophthalmol. 2005 Feb;139(2):346-8.

Optic disk size correlated with refractive error.

Author information

1
Department of Ophthalmology, Faculty of Clinical Medicine Mannheim, University of Heidelberg, Mannheim, Germany. Jost.Jonas@augen.ma.uni-heidelberg.de

Abstract

PURPOSE:

To evaluate for which range of refractive error the optic disk size depends on, or is independent of, the refractive error.

DESIGN:

Clinical observational study.

METHODS:

The study included 1999 eyes of 1011 subjects with a mean refractive error of -0.97 +/- 2.72 diopters (range, -24.25 to +9.4 diopters). Optic disk photographs were morphometrically evaluated.

RESULTS:

The relation between optic disk area and refractive error showed a curvilinear shape, with a steep increase toward high myopia starting at -8 diopters, and a decrease toward high hyperopia starting at +4 diopters.

CONCLUSION:

The optic disk size depends on the refractive error with an increase in highly myopic eyes beyond -8 diopters and a decrease in highly hyperopic eyes beyond +4 diopters. Confirming histomorphometric studies, the limits of -8 diopters and +4 diopters may be discussed to refine the definitions of high hyperopia and high myopia.

Comment in

PMID:
15734000
DOI:
10.1016/j.ajo.2004.07.047
[Indexed for MEDLINE]

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