title: SRK II formula in the calculation of intraocular lens power.
abstract: We studied 400 eyes which underwent cataract extraction with posterior chamber intraocular lens (IOL) implantation to compare the predictive accuracy of various IOL power calculation formulae. The new Sanders-Retzlaff-Kraff (SRK) II formula was more accurate than the original SRK and Binkhorst II formulae. Modification of the A constants used in the SRK II formula to make it 'surgeon specific' improved its performance further; 80% of the eyes had less than 1 dioptre error and only one eye (0.3%) had an error of more than 3 dioptres.
authors.affiliation: Department of Ophthalmology, Memorial Hospital, Darlington.
authors.forename: M S
authors.initials: MS
authors.lastname: Dang
authors.forename: P P
authors.initials: PP
authors.lastname: Raj
mesh_terms: D006801:Humans; D007910:Lenses, Intraocular; D008433:Mathematics; D055095:Optics and Photonics