This study is to evaluate the ability of a newly designed device, Optic Nerve Glass (O-Glass) to detect relative afferent pupillary defect (RAPD). In this prospective study, 44 patients (diagnosed RAPD- positive) enrolled the study. They were examined for an RAPD by O-Glass and also manual swinging flashlight method (SFM) . This newly designed instrument captures and records eye pictures. The images will be processed and analyzed using computerized software to calculate pupillary measurements.
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Number of Participants With Detected Relative Afferent Pupillary Defect (RAPD)
Timeframe: up to 6 months