![]() Reliability results were strong (CA > 0.7) for all measures. Convergent validity was investigated by calculating the bivariate correlation coefficient. Reliability was analyzed with intraclass correlation coefficients (ICC) between trials with Cronbach's alpha (CA) and the standard error of measurement for each ICC. For PD, the test was measured against the Rosenbaum Pocket Vision Screener (RPVS). Validity for IPD measured the test (RightEye IPD/PD) against the PL850 Pupilometer and the Essilor Digital CRP. Of these, 50 were examined for reliability and validity. ![]() Participants (416) across various demographics were examined for normative data. Validity of the test compared to known clinical tools was determined, and normative data was established against which individuals can measure themselves. The purpose of this study was to determine the reliability of interpupillary distance (IPD) and pupil diameter (PD) measures using an infrared eye tracker and central point stimuli.
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