The test seems simple enough ... the prototypes of this eye chart began with abstract shapes. Eventually, the chart included those familiar block letters. One of Snellen’s big accomplishments ...

optometrists each designed their own eye charts for testing patients. There was no standard, though, so the clinical test was far from universal. That changed in 1862 when ophthalmologist Hermann ...

A visual acuity test is an eye exam that checks how well you see the details of a letter or symbol from a specific distance. Visual acuity refers to your ability to discern the shapes and details ...

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 ...