The SRK regression formula in calculating the dioptric power of intraocular lenses.

Abstract
Eyes (171) with intraocular lenses were studied to compare the predictive accuracy of the Fyodorov and Van der Heijde theoretical formulae of the Sanders-Retzlaff-Kraff (SRK) regression formula. The SRK regression formula was the most accurate. Calculations of the A constants of this formula are given for several types of implants and manufacturers.