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 ...

People with astigmatism may see more ... An ophthalmologist may test a person’s night vision by using the Pelli-Robson Contrast Sensitivity Chart. It measures how well they can see the contrast ...

Astigmatism, derived from Greek meaning "without spot," refers to a common refractive condition that decreases acuity. Astigmatism has both a magnitude and a direction, or axis, unlike spherical ...