%0 Journal Article
%T Prospective study of toric IOL outcomes based on the Lenstar LS 900£¿ dual zone automated keratometer
%A Kjell Gunnar Gundersen
%A Richard Potvin
%J BMC Ophthalmology
%D 2012
%I BioMed Central
%R 10.1186/1471-2415-12-21
%X Fifty eyes were measured with the Lenstar LS 900£¿ dual-zone automated keratometer . Surgical planning was performed with the data from this device and the known surgically induced astigmatism of the surgeon. Post-operative refractions and visual acuity were measured at 1£¿month and 3£¿months.Clinical outcomes from 43 uncomplicated surgeries showed an average post-operative refractive astigmatism of 0.44D ¡À0.25D. Over 70% of eyes had 0.50D or less of refractive astigmatism and no eye had more than 1.0D of refractive astigmatism. Uncorrected visual acuity was 20/32 or better in all eyes at 3£¿months, with 70% of eyes 20/20 or better. A significantly higher number of eyes had 0.75D or more of post-operative refractive astigmatism when the standard deviation of the pre-operative calculated corneal astigmatism angle, reported by the keratometer, was£¿>£¿5 degrees.In this single-site study investigating the use of the keratometry from the Lenstar LS 900£¿ for toric IOL surgical planning, clinical outcomes appear equivalent to those reported in the literature for manual keratometry and somewhat better than has been reported for some previous automated instruments. A high standard deviation in the pre-operative calculated astigmatism angle, as reported by the keratometer, appears to increase the likelihood of higher post-operative refractive astigmatism.
%K Toric IOL
%K Astigmatism
%K Cataract surgery
%K Cataract surgery planning
%K Keratometer
%K Lenstar LS 900£¿
%U http://www.biomedcentral.com/1471-2415/12/21/abstract