Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes

In eyes with previous corneal refractive surgery, difficulties in accurately determining corneal refractive power and in predicting the effective lens position create challenges in intraocular lens (IOL) power calculations. There are three categories of methods proposed based on the use of historica...

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Main Authors: Li Wang, Douglas D Koch
Format: Article
Language:English
Published: Wolters Kluwer Medknow Publications 2022-01-01
Series:Taiwan Journal of Ophthalmology
Subjects:
Online Access:http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=22;epage=31;aulast=Wang
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author Li Wang
Douglas D Koch
author_facet Li Wang
Douglas D Koch
author_sort Li Wang
collection DOAJ
description In eyes with previous corneal refractive surgery, difficulties in accurately determining corneal refractive power and in predicting the effective lens position create challenges in intraocular lens (IOL) power calculations. There are three categories of methods proposed based on the use of historical data acquired prior to the corneal refractive surgery. The American Society of Cataract and Refractive Surgery postrefractive IOL calculator incorporates many commonly used methods. Accuracy of refractive prediction errors within ± 0.5 D is achieved in 0% to 85% of eyes with previous myopic LASIK/photorefractive keratectomy (PRK), 38.1% to 71.9% of eyes with prior hyperopic LASIK/PRK, and 29% to 87.5% of eyes with previous radial keratotomy. IOLs with negative spherical aberration (SA) may reduce the positive corneal SA induced by myopic correction, and IOLs with zero SA best match corneal SA in eyes with prior hyperopic correction. Toric, extended-depth-of-focus, and multifocal IOLs may provide excellent outcomes in selected cases that meet certain corneal topographic criteria. Further advances are needed to improve the accuracy of IOL power calculation in eyes with previous corneal refractive surgery.
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spelling doaj.art-98991346f56d4be09a10769eb86ddef72022-12-22T04:33:39ZengWolters Kluwer Medknow PublicationsTaiwan Journal of Ophthalmology2211-50562211-50722022-01-01121223110.4103/tjo.tjo_38_21Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomesLi WangDouglas D KochIn eyes with previous corneal refractive surgery, difficulties in accurately determining corneal refractive power and in predicting the effective lens position create challenges in intraocular lens (IOL) power calculations. There are three categories of methods proposed based on the use of historical data acquired prior to the corneal refractive surgery. The American Society of Cataract and Refractive Surgery postrefractive IOL calculator incorporates many commonly used methods. Accuracy of refractive prediction errors within ± 0.5 D is achieved in 0% to 85% of eyes with previous myopic LASIK/photorefractive keratectomy (PRK), 38.1% to 71.9% of eyes with prior hyperopic LASIK/PRK, and 29% to 87.5% of eyes with previous radial keratotomy. IOLs with negative spherical aberration (SA) may reduce the positive corneal SA induced by myopic correction, and IOLs with zero SA best match corneal SA in eyes with prior hyperopic correction. Toric, extended-depth-of-focus, and multifocal IOLs may provide excellent outcomes in selected cases that meet certain corneal topographic criteria. Further advances are needed to improve the accuracy of IOL power calculation in eyes with previous corneal refractive surgery.http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=22;epage=31;aulast=Wangcorneal refractive surgeryintraocular lens power calculationlasikphotorefractive keratectomyradial keratotomysmall-incision lenticule extraction
spellingShingle Li Wang
Douglas D Koch
Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
Taiwan Journal of Ophthalmology
corneal refractive surgery
intraocular lens power calculation
lasik
photorefractive keratectomy
radial keratotomy
small-incision lenticule extraction
title Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
title_full Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
title_fullStr Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
title_full_unstemmed Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
title_short Intraocular lens power calculations in eyes with previous corneal refractive surgery: Challenges, approaches, and outcomes
title_sort intraocular lens power calculations in eyes with previous corneal refractive surgery challenges approaches and outcomes
topic corneal refractive surgery
intraocular lens power calculation
lasik
photorefractive keratectomy
radial keratotomy
small-incision lenticule extraction
url http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=22;epage=31;aulast=Wang
work_keys_str_mv AT liwang intraocularlenspowercalculationsineyeswithpreviouscornealrefractivesurgerychallengesapproachesandoutcomes
AT douglasdkoch intraocularlenspowercalculationsineyeswithpreviouscornealrefractivesurgerychallengesapproachesandoutcomes