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Steady-state accommodation responses were measured in both eyes as a function of vergence angle and direction of lateral gaze. The measurements were made with a binocular laser optometer. Small speckle patterns were used as fusional stimuli in an otherwise dark field. These patterns have the advantage of providing no blur stimulus to accommodation. Convergence accommodation for vergence angles ranging from 0 to 25 deg was measured for lateral-gaze angles of plus 32, minus 32, and 0 deg. The average accommodation of the two eyes was linearly related to vergence angle over the observer's accommodative range but was independent of the angle of lateral gaze. The mean convergence accommodation/convergence ratio for three subjects, in diopters per meter-angle, was 0. 9.

Original languageEnglish (US)
Pages (from-to)332-338
Number of pages7
JournalJournal of the Optical Society of America
Issue number3
StatePublished - 1983


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