If you have ever been in the office of an optometrist, then you have likely seen a Snellen eye chart. The Snellen eye chart is the paper that has large letters towards the top that get smaller near the bottom of the paper. Your eye doctor in Miami Beach will use this chart to determine how well you are able to see. If you are told that you have 20/20 vision, then it means that your eyesight is normal in comparison to other people. Having 20/20 vision means that you are able to see an object at the distance of 20 feet as well as most other people can see the same object at the same distance. The chart was invented by an ophthalmologist by the name of Herman Snellen in the year 1862. However, it’s common for an eye doctor in Miami to now use the LogMAR chart, which is an improved version of the Snellen chart.
The eye chart used to determine a person’s visual acuity was originally invented with dingbats, or symbols, instead of using letters. If you ask your Miami Beach eye doctor to tell you more about the Snellen eye chart, you will likely find out some interesting information that you were not aware of.
Your Miami optometrist is likely going to keep a Snellen eye chart in their office until a more technologically advanced method of testing visual acuity is invented. For example, the LogMAR chart is similar to the Snellen chart in appearance, but it has a different amount of letters and rows on it. This new chart is more accurate in helping doctors determine how well a person is able to see. As time passes and technology progresses, though, a better way to test a person’s visual acuity may arise. If at some point in the next few years your eye doctor asks you to look through a special machine to test your visual acuity instead of looking at a chart on the wall, don’t be surprised!
photo credit: National Eye Institute Snellen Visual Acuity Chart via photopin (license)