Sehschärfescharts
Sehschärfescharts, often referred to as eye charts or vision charts, are standardized visual acuity tests used to measure how clearly a person sees. They are a fundamental tool in ophthalmology and optometry for diagnosing vision problems and monitoring eye health. The most common type features a series of progressively smaller letters or symbols arranged in rows. The patient is asked to read the lowest line they can clearly distinguish from a specific distance, typically 20 feet (6 meters). The results are expressed as a fraction, such as 20/20, where the top number represents the testing distance and the bottom number indicates the size of the smallest line read, relative to what a person with normal vision can see at that distance.
The Snellen chart, developed by Dutch ophthalmologist Hermann Snellen in the 1860s, is the most widely recognized