Prospective study of toric IOL outcomes based on the Lenstar LS 900® dual zone automated keratometer

BMC Ophthalmology

Research Article

Kjell Gunnar Gundersen¹  Richard Potvin² 

[1] Privatsykehuset Haugesund, Haraldsgaten 139, 5527, Haugesund, Norway;Science in Vision, 13860 E. Riviera Dr, 76028, Burleson, Texas, USA;

关键词: Toric IOL;    Astigmatism;    Cataract surgery;    Cataract surgery planning;    Keratometer;    Lenstar LS 900®;   

DOI  :  10.1186/1471-2415-12-21

 received in 2012-04-13, accepted in 2012-07-16,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundTo establish clinical expectations when using the Lenstar LS 900® dual-zone automated keratometer for surgery planning of toric intraocular lenses.MethodsFifty 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.ResultsClinical outcomes from 43 uncomplicated surgeries showed an average post-operative refractive astigmatism of 0.44D ±0.25D. 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.ConclusionsIn 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.

【 授权许可】

CC BY   
© Gundersen and Potvin; licensee BioMed Central Ltd. 2012