Examines how a central fusion stimulus affects fixation disparity measurements, suggesting improved clinical assessments.
Fixation disparity (FD) measurements were made with a 1.5° diameter fusional stimulus both with and without a central fusion stimulus. Measurements were made at 40 cm with no prism, 5° base‐in (Bl) and base‐out (BO), and 10° Bl and BO, on a group of asymptomatic subjects. The central fusion stimulus results in less variable measurements and a flatter slope of the fixation disparity curve (FDC). Implications of the use of the central stimulus for clinical measurements are discussed.
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DEBYSINGH et al. (1986) studied this question.
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