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VARIATION OF DARK FOCUS OF ACCOMMODATION WITH LASER SPECKLE EXPOSURE DURATION
Author(s) -
Kothe A. C.,
Lovasik J. V.,
Campbell M. C. W.
Publication year - 1987
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.1475-1313.1987.tb01010.x
Subject(s) - speckle pattern , accommodation , optics , laser , multiple exposure , amplitude , physics
Dark focus of accommodation (DFA) was measured in 10 subjects using a computer‐aided He‐Ne Badal laser optometer having high temporal and amplitude resolution. Accommodative responses were tracked during 5 min sessions for 10 speckle exposure durations ranging from 100 to 1000 ms. DFA‐speckle exposure functions fell into four distinct groups. This identifies the laser speckle exposure time as a possible contaminant in measures of DFA made by laser optometers if individual variability across exposure times is ignored. Group averaging of accommodative responses for laser exposure times obfuscates the reported individual variability.