Comparison of alternate cover test reliability at near in non-strabismus between experienced and novice examiners.

Purpose: The purpose of this study was to determine the reliability of the prism neutralized alternate cover test (ACT) used to measure near phoria in non-strabismic participants as measured by experienced and novice examiners and to compare the values to results obtained by eye tracking.

Methods: Two experienced optometrists and two optometry students performed the ACT at 40 cm on 50 non-strabismic participants. The ACT was then repeated with the subjects wearing an eye tracker.