Letters eye test. 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. 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. 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.
There are many variations of the snellen eye chart but in general they show 11 rows of capital letters. Test your eyesight in this eye test in front of the computer. If youre at all worried about the expense of having your childs eyes tested dont be.
Only people with 2020 vision can pass this eye chart test. What 2020 vision in an eye test means. Eye wonder how youll do.
Unfortunately the offices of most opticianseye doctors in the us are not twenty feet long. Many ophthalmologists and vision scientists now use an improved chart known as the logmar chart. Free nhs eye test all children under 16 qualify for an nhs voucher entitling them to a free eye test.