title: Temporal stability of the dark focus of accommodation.
abstract: The temporal stability of the dark focus of accommodation (the refractive power of the eye in total darkness) was examined using a laser optometer. It was found that dark focus does not vary greatly in most subjects over a period of 2--3 weeks. Intrasubject ranges varied from 0.08--2.92 over that period, with a mean range of 1.07 D. Theoretical and practical implications of these findings are discussed.
mesh_terms: D000065:Accommodation, Ocular; D000328:Adult; D003624:Darkness; D005260:Female; D006801:Humans; D007834:Lasers; D008297:Male; D013997:Time Factors; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods