Optometry and Vision Science · 1978 · 128 citations · 0 references
MedicineOphthalmologyOptometryClinical OptometryClinical Vision ScienceVisual DisordersBinocular Vision AssessmentBinocular Vision EvaluationComprehensive Eye ExaminationFixation DisparityVergence DisordersVisual ImpairmentAsymptomatic Fixation DisparityClinical Assessment Of VergenceClinical Oculomotor AssessmentFixation Disparity CurvesFixation Disparity MeasurementFixation Disparity TestingLinear Discriminant AnalysisPsychometric Curve Slope
Phoria, vergence, and fixation-disparity were measured at near working distances for a nonclinical sample of 3rd-yr optometry students. A questionnaire divided the sample into 33 symptomatic and 44 asymptomatic subjects. Discriminant analysis was used to determine which clinical measures best predicted the group to which each subject belonged. Sheard's criterion was a good discriminator for exo deviations, and a variant of Percival's criterion was good for eso deviations. Fixation-disparity variables proved to be valuable diagnostically. The best fixation-disparity measures were the curve slope, curve type, and amount of fixation disparity.