title: Behavioral measurements of accommodative amplitude in rhesus monkeys.
abstract: The extent of voluntary accommodation was investigated behaviorally in two young rhesus monkeys and an adult human using a modified minus-lens technique. Specifically, contrast sensitivity for a high spatial frequency grating was determined as a function of spectacle lens power. Accommodative amplitudes derived from contrast sensitivity vs lens power functions indicate that young monkeys have at least 17 to 18 D of voluntary accommodation and that the accommodative amplitudes of monkeys are larger than those of equivalent-aged humans.
mesh_terms: D000065:Accommodation, Ocular; D000328:Adult; D000818:Animals; D005139:Eyeglasses; D006801:Humans; D008253:Macaca mulatta; D010364:Pattern Recognition, Visual / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D014792:Visual Acuity