Evaluation of an open-field autorefractor's ability to measure refraction and hence potential to assess objective accommodation in pseudophakes


Background: To evaluate the accuracy of an open-field autorefractor compared with subjective refraction in pseudophakes and hence its ability to assess objective eye focus with intraocular lenses (IOLs). Methods: Objective refraction was measured at 6 m using the Shin-Nippon NVision-K 5001/Grand Seiko WR-5100K open-field autorefractor (five repeats) and by subjective refraction on 141 eyes implanted with a spherical (Softec1 n=53), aspherical (SoftecHD n=37) or accommodating (1CU n=22; Tetraflex n=29) IOL. Autorefraction was repeated 2 months later. Results: The autorefractor prescription was similar (average difference: 0.09±0.53 D; p=0.19) to that found by subjective refraction, with ~71% within ±0.50 D. The horizontal cylindrical components were similar (difference: 0.00±0.39 D; p=0.96), although the oblique (J45) autorefractor cylindrical vector was slightly more negative (by -0.06±0.25 D; p=0.06) than the subjective refraction. The results were similar for each of the IOL designs except for the spherical IOL, where the mean spherical equivalent difference between autorefraction and subjective was more hypermetropic than the Tetraflex accommodating IOL (F=2.77, p=0.04). The intrasession repeatability was

Publication DOI: https://doi.org/10.1136/bjo.2010.185009
Divisions: College of Health & Life Sciences > Ophthalmic Research Group
College of Health & Life Sciences > Vision, Hearing and Language
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry
Additional Information: This article has been accepted for publication in British Journal of Ophthalmology. The definitive copyedited, typeset version Wolffsohn, JS, Davies, LN, Naroo, SA, Buckhurst, PJ, Gibson, GA, Gupta, N, Craig, JP & Shah, S 2011, 'Evaluation of an open-field autorefractor's ability to measure refraction and hence potential to assess objective accommodation in pseudophakes', British journal of ophthalmology, vol 95, no. 4, pp. 498-501 is available online at: http://bjo.bmj.com/content/95/4/498
Uncontrolled Keywords: ocular accommodation,aged,female,humans,intraocular lenses,male,optical devices,pseudophakia,ocular refraction,refractive errors,reproducibility of results,vision screening,visual acuity,Ophthalmology,Sensory Systems,Cellular and Molecular Neuroscience
Full Text Link: http://bjo.bmj. ... ontent/95/4/498
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2011-04
Published Online Date: 2010-07-23
Authors: Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Davies, Leon N. (ORCID Profile 0000-0002-1554-0566)
Naroo, Shehzad A. (ORCID Profile 0000-0002-6373-7187)
Buckhurst, Phillip J.
Gibson, George A.
Gupta, Navneet
Craig, Jennifer Patricia
Shah, Sunil (ORCID Profile 0000-0002-5373-5305)



Version: Accepted Version

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