Ocular motor triad with single vision contact lenses compared to spectacle lenses

摘要: Aim: Theoretically myopes are required to exert more accommodation and vergence when wearing single vision contact lenses compared glasses hypermetropes less. This study aims quantify the effects clinically. Method: Thirty subjects (21 female, nine male, average age 21.0 ± 2.2 years) with a range of refractive errors (-7.87 D +3.50 D) viewed in random order, static targets at 0.1, 0.5, 1.0, 2.0, 3.0, 4.0 5.0 accommodative demand that were matched for angular subtense. The fully corrected spectacles daily disposable their full prescription. Accommodation was monitored objectively PowerRefractor Shin-Nippon SRW5000 pupil size PowerRefractor. Results: Myopes exerted greater effort viewing near than less (r2 = 0.35, p 0.001 PowerRefractor). also 0.22, < 0.01). Conclusion: Theoretical calculation requirements reflect clinical findings, although there is reasonable variability between individuals. © 2006 British Contact Lens Association.