Dr. Robert Arnold is a pediatric ophthalmologist working in Alaska and committed to the Pediatric Eye Disease Investigation. In fact, he is part of the Alaska Blind Child Discovery, a cooperative, charitable research project to provide valid image interpretation and parental notification for volunteer charitable screening in urban and rural Alaska.

In this video he explains how CR-App inside 2WIN works: this App allows you to measure hetero-tropias and / or hetero-phorias. It compares the position of the corneal reflexes in three different measurements (the first binocular, the second and the third monocular under an infrared occluder). A black handheld filter is included and allows the 2WIN infrared rays to pass through while blocking all visible light.