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The effect of induced intraocular straylight on perimetric tests

Bergin, Clara, Redmond, Tony, Nathwani, Neil, Verdon-Roe, Gay Mary, Crabb, David P., Anderson, Roger S. and Garway-Heath, David F. 2011. The effect of induced intraocular straylight on perimetric tests. Investigative Ophthalmology & Visual Science 52 (6) , pp. 3676-3682. 10.1167/iovs.10-6642

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Abstract

Purpose. To investigate the effect of intraocular straylight (IOS) on threshold measurements made by four types of perimetry: standard automated perimetry (SAP), frequency-doubling technology (FDT) perimetry, flicker-defined form (FDF) perimetry, and the Moorfields Motion Displacement Test (MDT). Methods. Six healthy young (21–29 years) psychophysically experienced observers were tested five times with each perimeter, each time with one of five different white opacity filters (WOFs), to induce various levels of IOS. Each WOF gave rise to an increase in IOS, measured with a straylight meter, of between 10% and 200% from baseline and ranging in effect from normal ageing to significant cataract. The change in sensitivity from baseline was normalized, allowing comparison of standardized (z) scores (change divided by the standard deviation of normative values) for each instrument. Results. Average SAP, FDT, and FDF thresholds were significantly affected (P < 0.001) by moderate to large increases in IOS (50%–200%), whereas MDT remained largely unaffected over the same range of straylight levels. Conclusions. The Moorfields MDT shows greater resilience to the effects of additional straylight compared with SAP, FDT, or FDF.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Optometry and Vision Sciences
Subjects: R Medicine > RE Ophthalmology
Additional Information: Confirmation received by publisher on 21 February 2014 that publisher's pdf can be self-archived 6 months after publication.
Publisher: Association for Research in Vision and Ophthalmology
ISSN: 0146-0404
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 04:19
URI: http://orca-mwe.cf.ac.uk/id/eprint/36685

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