Letters eye test. Eye wonder how youll do. The standard placement of the chart on a wall in the us is twenty feet away from a persons vision. 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.
The classic example of an eye chart is the snellen eye chart developed by dutch eye doctor hermann snellen in the 1860s. What 2020 vision in an eye test means. Free nhs eye test all children under 16 qualify for an nhs voucher entitling them to a free eye test.
With this online eye test you can do an eye test from the comfort of your couch or office chair. 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.
Only people with 2020 vision can pass this eye chart 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. The snellen test uses the familiar chart which has a series of letters of different sizes ranging from the largest at the top to the smallest letters at the bottom.