What is the standard eye exam chart?

A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen's graphics are named after the Dutch ophthalmologist Herman Snellen, who developed the painting in 1862.Many ophthalmologists and vision scientists now use an improved graph known as a LogMar chart. There have been adjustments and variations over the past century and a half, but the eye chart itself hasn't changed much, although it has been improved. The decidedly low-tech eye chart with a massive E on the top line is found in almost every ophthalmologist's office in the United States.

Eye charts don't help the ophthalmologist determine if you have an eye disease, such as glaucoma, or a retinal problem. Depending on your risk factors for eye diseases and your current symptoms or illnesses, your ophthalmologist may recommend that you have more frequent examinations. If you don't wear glasses or contact lenses, your ophthalmologist will use the results to see if you need them. Your ophthalmologist gives you a card with 11 short paragraphs numbered from 1 (smallest letter) to 11 (largest letter).

Snellen created the standardized ophthalmology chart, each ophthalmologist or eye doctor had a chart they preferred, says Jenny E. We often measure the standard of vision achieved with or without glasses using the familiar eye test chart (Snellen), which is seen from a distance of 6 meters (20 feet). It was developed by Swiss ophthalmologist Edward Landolt and is considered the laboratory standard by the International Council of Ophthalmology. Eye professionals can use certain tables to measure distance vision and others to measure near vision.

The ophthalmologist will then ask you about your general health, including the medications you take and your family's medical history.

Gregor Potzl
Gregor Potzl

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