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Volume 42, 1992, p. 142148

Comparison of Fixation Preference and Forced Preferential Looking in Preverbal Children (Abstract)
W. Andrew Wells, Eugene M. Helveston, M.D.


Clinical fixation preference was compared to forced preferential looking (FPL) acuity using the acuity card procedure (ACP) in 52 subjects between one and 34 months of age. Four of 6 subjects with more than 2 octaves inter acuity difference (IAD) were diagnosed as preferring the eye with better FPL acuity. If a one octave difference is considered significant for IAD, 87% (20/23) subjects were correctly identified by noting fixation preference clinically. Disparity between IAD with FPL and fixation preference was more likely to occur with minimal IAD with FPL and in younger patients. This study assumed that FPL was the more precise measure of true IAD.