Accuracy of predicted refraction with multifocal intraocular lenses using two biometry measurement devices and multiple intraocular lens power calculation formulas
Author(s) -
Reitblat Olga,
Assia Ehud I,
Kleinmann Guy,
Levy Adi,
Barrett Graham D,
Abulafia Adi
Publication year - 2015
Publication title -
clinical and experimental ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.3
H-Index - 74
eISSN - 1442-9071
pISSN - 1442-6404
DOI - 10.1111/ceo.12478
Subject(s) - intraocular lens power calculation , medicine , refraction , cataract surgery , ophthalmology , multifocal intraocular lens , intraocular lens , optometry , limits of agreement , refractive error , mean absolute error , keratometer , mean squared prediction error , subjective refraction , phacoemulsification , cornea , optics , mathematics , eye disease , visual acuity , algorithm , nuclear medicine , statistics , physics , mean squared error
Abstract Background To evaluate the accuracy of predicted refraction using multifocal intraocular lenses ( IOLs ) with power calculation based on two biometric devices and multiple IOL power calculation formulas. Design A retrospective study conducted in a private practice ophthalmology clinic. Participants Seventy‐three eyes of 48 patients were evaluated. Methods Consecutive cases of eyes that had undergone successful cataract surgery with an implantation of a multifocal IOL ( SN 6 AD 1, A lcon L aboratories, I nc., Fort Worth, TX, USA) by a single surgeon were enrolled. Patients were meticulously screened for suitability for a multifocal IOL implantation according to our clinic guidelines. Two biometric measurement devices ( IOLM aster‐500 [ C arl Z eiss M editec AG , Jena, G ermany] and L enstar‐ LS 900 [ H aag‐ S treit AG, K oeniz, S witzerland]) were used under strict validation criteria to evaluate the predicted refraction errors for the H olladay 1, SRK / T , H offer Q , Haigis, H olladay 2 , B arrett U niversal II and O lsen formulas. Main Outcome Measures Predicted refractive sphere equivalent ( RSE ) errors. Results The measurements obtained from the two biometric devices were highly correlated. The standard deviation of the error in predicted RSE and the median absolute error were similar for the IOLM aster and the L enstar devices using all formulas, ranging from 0.27 dioptres ( D ) to 0.31 D and from 0.15 D to 0.21 D , respectively. A high percentage of eyes had an error in predicted RSE within ±0.5 D from target refraction, ranging from 86.3% to 93.2%. Conclusions High accuracy can be achieved in multifocal IOL power calculations by appropriate patient selection, precise biometry and appropriate IOL calculation formulas.