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ADAPTATION OF TONIC ACCOMMODATION
Author(s) -
Schor Clifton M.,
Johnson Chris A.,
Post Robert B.
Publication year - 1984
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1984.tb00346.x
Subject(s) - accommodation , tonic (physiology) , monocular , prism adaptation , adaptation (eye) , stimulus (psychology) , psychology , near vision , audiology , optics , neuroscience , cognitive psychology , medicine , visual acuity , physics
We compared the resting (dark) focus of accommodation before and after adapting to accommodative stimuli placed nearer or farther from an initial baseline resting focus. Short‐term monocular adaptation (< 2 min) did not result in consistent after‐effects that were correlated with the adaptation stimulus. After short‐term adaptation, accommodation returned to its resting level in 2–15s. Long‐term monocular adaptation (30 min) to a 6‐D near stimulus resulted in a small (0.5‐D) average increase in the resting focus of accommodation beyond the normal 2–15‐s short‐term decay. These observations illustrate a tonic adaptation of accommodation that is small and requires longer durations of adaptation than an analogous adaptation of the fusional vergence system to prism.