Posterior chamber lenses with convex side posteriorly--the calculation of dioptric power and results.

Out of 2,000 calculated and implanted posterior chamber lenses with the convex side posteriorly we selected all patients with intraocular lenses having a power of 9 to 11 or 29 to 30 diopters. We found significant differences in the results of IOL-power calculation, using the SRK-formula or the theoretical mathematic formula. Using the distance between the corneal vertex and the first principal point of the plano convex lens as the anterior chamber depth we find that the theoretical formula is the most accurate in calculating the IOL-power of higher hypermetropic eyes.