Relative Afferent Pupillary Defect

As variability among various VR devices is an important factor that clinicians should consider, we discuss the test–retest reliability of VR-SFT and the variability among various assessments and between two devices.

The swinging flashlight test (SFT) is widely used to diagnose any lesion in the afferent visual pathway which causes an asymmetric pupillary reaction in response to light, known as a relative afferent pupillary defect (RAPD). Due to the high subjectivity associated with traditional SFT, we propose an Arduino-based automated RAPD detection system.