Given below is an online test for visual acuity using the E Chart, a chart with the letter 'E' in different directions (up, down, right and left) and sizes. This E chart visual acuity or eye vision ...

The device provides accurate visual acuity testing that can be ... afocal optics system to recapitulate the current 6-metre test in 0.5 meters, which rules out the effects of positioning variation ...