Posterior corneal curvature. Correlations in normal eyes and in eyes involved with primary angle-closure glaucoma.

Measurements of the radius of curvature of the anterior surface of the cornea were facilitated by the ophthalmometer of Helmholtz of I856, and became part of clinical practice following modifications in the principle and design of the instrument by Javal and Schiotz in I 88 I. Many studies have been published concerning anterior corneal curvature, but there is an extreme dearth of information pertaining to measurements of posterior corneal curvature.