RT Journal Article
SR Electronic
T1 SRK II formula in the calculation of intraocular lens power.
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 823
OP 826
DO 10.1136/bjo.73.10.823
VO 73
IS 10
A1 M S Dang
A1 P P Raj
YR 1989
UL http://bjo.bmj.com/content/73/10/823.abstract
AB 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.