Vision Test Chart Set
E-chart: 255mm x 750mm
An eye chart is a chart used to measure visual acuity. Eye charts are often used by healthcare professionals, such as optometrists, physicans or nurses, to screen persons for vision impairment. Eye doctors use eye charts to measure how well you see in the distance, compared with other human beings.
The chart is placed at a standardised distance away from the person whose vision is being tested. Cover one eye, completely blocking the vision of the covered eye, without applying any pressure. Identity a line on the chart you can comfortably read. Read the letters on that line aloud. Continue trying to read the letters on each successively smaller line. Do not squint. Stop when you fail to correctly identify at least 50% of the letters on a line. Switch to the other eye and repeat. The smallest symbols that can be reliably identified is considered the person's visual acuity.