Adults need 2.5" between Eyes, but this is too far for kids eyes. Adults = 2.5" = 52 Pixels difference = left eye 26 pixels, Right eye 26 pixels Kids = 2.0" = ? Pixels = Left eye ? Pixels = Right eye ? Pixels (less than 26 each eye is all I know) This is to calculate the parallax in 3D video. I need to know how much pixels kids use, and all I know is it's less than the 52 pixels for Adults eyes.