title: Irlen lenses do not improve accommodative accuracy at near.
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.
authors.affiliation: SUNY State College of Optometry, Department of Vision Sciences, New York, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Ciuffreda
authors.forename: M
authors.initials: M
authors.lastname: Scheiman
authors.forename: E
authors.initials: E
authors.lastname: Ong
authors.forename: M
authors.initials: M
authors.lastname: Rosenfield
authors.forename: H A
authors.initials: HA
authors.lastname: Solan
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D003116:Color; D005139:Eyeglasses; D005260:Female; D005374:Filtration; D006801:Humans; D008297:Male; D009907:Optometry / Q000379:methods; D011897:Random Allocation; D014786:Vision Disorders / Q000503:physiopathology / Q000628:therapy*; D014792:Visual Acuity