The effect of refractive error on the accommodative response gradient.
The accommodative responses of early-onset myopes, late-onset myopes, emmetropes and hyperopes were measured over a range of 5 dioptres using an objective infra-red autorefractor. Differences were found between the four refractive groups, with hyperopes accommodating more for near targets than emmetropes, followed by early-onset myopes then late-onset myopes. Moreover a strong correlation between the accommodative response gradient and refractive error was found, suggesting that hyperopes accommodate more to a particular target than do emmetropes or myopes. The results are interpreted in the context of a dual innervation to the ciliary muscle.
D000065:Accommodation, Ocular; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology; D009216:Myopia / Q000503:physiopathology; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000503:physiopathology*