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Eur J Ophthalmol ; 33(4): NP19-NP22, 2023 Jul.
Article in English | MEDLINE | ID: mdl-35570570

ABSTRACT

OBJECTIVE: To report a case of post radial keratotomy (RK) cataract in a 55-year-old lady wherein biometry was done by ray-tracing method incorporated in scheimpflug topographer (Sirius + Scheimpflug Analyzer, CSO, Italy). METHOD: In our case, we performed intraocular lens (IOL) power calculation using a recent concept of ray tracing with scheimpflug topographer and compared with traditional methods available at American Society of Cataract and Refractive Surgery(ASCRS) website (www.ascrs.org) for eyes with prior RK. Phacoemulsification was performed and a monofocal + 24.5D IOL implanted in the capsular bag. RESULT: Manifest refraction at six weeks postoperative period was + 1.0DS/-2.0DC × 75° with spherical equivalence of 0. On comparison of all the methods used to calculate IOL power, the absolute errors of ray tracing and Barrett true K were found to be the least, 0.14 and 0.18 respectively. CONCLUSION: Ray tracing biometry with scheimpflug topographer seems to provide accurate IOL power in post RK eyes.


Subject(s)
Cataract , Keratotomy, Radial , Lenses, Intraocular , Phacoemulsification , Female , Humans , Middle Aged , Keratotomy, Radial/adverse effects , Lens Implantation, Intraocular , Refraction, Ocular , Cataract/diagnosis , Biometry/methods , Optics and Photonics , Retrospective Studies
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