Intraocular lens power calculations using corneal topography after photorefractive keratectomy

PURPOSE: To report two patients (two eyes) with previous photorefractive keratectomy, who subsequently underwent cataract extraction years later. DESIGN: Case reports. METHODS: Corneal topography was used to determine corneal power used in intraocular lens power calculations. RESULTS: In two eyes of...

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Bibliographic Details
Published in:American journal of ophthalmology 2001-08, Vol.132 (2), p.254-255
Main Authors: Ladas, John G, Boxer Wachler, Brian S, Hunkeler, John D, Durrie, Daniel S
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cornea - surgery
Corneal Topography - adverse effects
Humans
Hyperopia - etiology
Lasers, Excimer
Lens Implantation, Intraocular - adverse effects
Lenses, Intraocular
Male
Medical sciences
Middle Aged
Myopia - surgery
Optics and Photonics
Phacoemulsification
Photorefractive Keratectomy
Refraction, Ocular
Reoperation
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the eye and orbit
Visual Acuity
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Summary:PURPOSE: To report two patients (two eyes) with previous photorefractive keratectomy, who subsequently underwent cataract extraction years later. DESIGN: Case reports. METHODS: Corneal topography was used to determine corneal power used in intraocular lens power calculations. RESULTS: In two eyes of two patients, intraocular lens calculations after photorefractive keratectomy were inadequate, which resulted in a hyperopic postoperative refractive error requiring implantation of a piggyback intraocular lens. CONCLUSION: Corneal topography to determine corneal power in patients with previous photorefractive keratectomy may result in unpredictable intraocular lens power calculations. The clinical history method is the standard to determine corneal power and should be considered in intraocular lens calculations before cataract surgery. We recommend supplying refractive patients with preoperative data for use in future formulas for intraocular lens selection.
ISSN:0002-9394
1879-1891
DOI:10.1016/S0002-9394(01)00894-7