Letters eye test. Unfortunately the offices of most opticianseye doctors in the us are not twenty feet long. Only people with 2020 vision can pass this eye chart test. The classic example of an eye chart is the snellen eye chart developed by dutch eye doctor hermann snellen in the 1860s.
The standard placement of the chart on a wall in the us is twenty feet away from a persons vision. Take the snellen eye test online to determine your vision strength ie. Many ophthalmologists and vision scientists now use an improved chart known as the logmar chart.
There are many variations of the snellen eye chart but in general they show 11 rows of capital letters. A snellen chart is an eye chart that can be used to measure visual acuitysnellen charts are named after the dutch ophthalmologist herman snellen who developed the chart in 1862. Free nhs eye test all children under 16 qualify for an nhs voucher entitling them to a free eye test.
If you currently wear prescription glasses youll need to perform the test with and without glasses to have an indication of whether your current prescription is accurate. Test your eyesight in this eye test in front of the computer. What 2020 vision in an eye test means.