The radius of curvature of the posterior surface of the cornea was mea
sured in the vertical meridian for 120 children aged 6 to 17 years, us
ing a Purkinje image method, The mean radius of curvature (+/-SD) was
6.42 +/- 0.31 mm, with a range from 5.62 to 7.22 mm, The ratio of ante
rior to posterior corneal radius was 1.210 +/- 0.045 or 0.827 +/-: 0.0
29 when expressed as a reciprocal, There was a significant correlation
between the anterior and posterior corneal radius (y = 0,798x + 0.228
, r(2) = 0.45), The study provides data that may be applied to a four-
surface schematic eye.