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Optom Vis Sci. 1997 May;74(5):298-302.

Irlen lenses do not improve accommodative accuracy at near.

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  • 1SUNY State College of Optometry, Department of Vision Sciences, New York, USA.

Abstract

The purpose of the experiment was to determine the influence of Irlen lenses on steady-state accommodation in successful users, as there is speculation that near accommodative dysfunction may be a factor in these patients. Monocular steady-state accommodation in six successful Irlen patients was assessed for near blur stimuli (2, 3, and 4 D) either with nonfiltered spectacle refractive correction or their spectrally broad-band filtered spectacle refractive correction. Accommodation was measured subjectively using a Hartinger coincidence optometer. There was no significant difference in mean level of accommodation between the two conditions. Additionally, there was a small but significant increase in accommodative variability with the filtered prescription. The use of Irlen correction did not have any positive effect on monocular steady-state accommodation at near.

PMID:
9219289
[PubMed - indexed for MEDLINE]
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