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Corneal astigmatism analysis for toric intraocular lens implantation: precise measurements for perfect correction

 Lee, Hun  ;  Kim, Tae-im  ;  Kim, Eung Kweon 
 Current Opinion in Ophthalmology, Vol.26(1) : 34-38, 2015 
Journal Title
 Current Opinion in Ophthalmology 
Issue Date
Astigmatism/diagnosis* ; Astigmatism/surgery ; Corneal Diseases/diagnosis* ; Corneal Diseases/surgery ; Diagnostic Techniques, Ophthalmological/instrumentation ; Humans ; Lens Implantation, Intraocular* ; Lenses, Intraocular* ; Phacoemulsification* ; Visual Acuity
anterior corneal stigmatism ; cataract surgery ; posterior corneal astigmatism ; toric intraocular lens
PURPOSE OF REVIEW: Corneal astigmatism is a common refractive error observed in a significant percentage of cataract patients. Accurate measurements of the preexisting corneal astigmatism are essential in order to achieve the desired refractive outcome after toric intraocular lens (IOL) implantation. This article presents a comprehensive review of recent published literatures on methods for measuring preoperative corneal astigmatism for toric IOL implantation. RECENT FINDINGS: A variety of instruments has been introduced and used to measure the magnitude and meridian of corneal astigmatism during preoperative assessments of cataract patients. Instruments that consider both the anterior and posterior corneal surfaces as critical factors for measuring total corneal astigmatism are expected to provide better accuracy. Although these instruments facilitate improved evaluations of corneal astigmatism and have helped minimize postoperative residual astigmatism, a perfect method to analyze preoperative corneal astigmatism has not yet been established. SUMMARY: Perfect correction of astigmatism after toric IOL implantation by using accurate corneal astigmatism values is the goal of this surgical procedure. To achieve this, correct and precise measurements of corneal astigmatism to determine the magnitude and meridian should be obtained.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eung Kweon(김응권) ORCID logo https://orcid.org/0000-0002-1453-8042
Kim, Tae Im(김태임) ORCID logo https://orcid.org/0000-0001-6414-3842
Lee, Hun(이훈)
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