A simple illusion? but yet effective blind spot test. Instructions: 1. Center your head to the screen; 2. Close your left eye; 3. Focus your right eye on the circle; 4. See what happens to the moving cross.
A simple illusion? but yet effective blind spot test. Instructions: 1. Center your head to the screen; 2. Close your left eye; 3. Focus your right eye on the circle; 4. See what happens to the moving cross.