Clinical assessment of a hand-held automated keratometer in cataract surgery

Eye
M Leyland, L Benjamin

Abstract

Pre-operative keratometry was performed on 32 eyes of 32 patients undergoing extracapsular cataract extraction with intraocular lens implantation, for calculation of intraocular lens power. In an additional 20 eyes of 20 patients post-operative keratometry was performed to guide selective suture removal. Readings from a manual keratometer and an automated hand-held keratometer were compared. Pre-operative measurements were repeated three times on each subject to assess the repeatability of each machine. Mean-difference plots were performed to define the limits of agreement of the two machines. Repeatability was higher using manual keratometry (MK) than automated keratometry (AK). There was broad agreement between the two machines in pre-operative and post-operative assessment, although clinically significant differences are likely to occur in some cases. MK should continue to be used for routine pre-operative keratometry, with the AK providing a useful alternative when MK is not possible. AK is sufficiently accurate to allow its use in post-operative assessment of suture-induced astigmatism.

References

Jan 1, 1992·Eye·G P Misson
Mar 1, 1988·Journal of Cataract and Refractive Surgery·D R SandersM C Kraff
Nov 1, 1995·The British Journal of Ophthalmology·E M HarveyV Dobson

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Citations

Dec 25, 2004·Journal of Cataract and Refractive Surgery·Andrew K C LamRoger Chiu
Mar 17, 2010·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·David L RogersGary L Rogers
Mar 31, 2004·Journal of Cataract and Refractive Surgery·Andrew K C LamRoger Chiu

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