If you are looking to have your vision tested, you may come across a Snellen Chart. This chart is a tool commonly used by optometrists and ophthalmologists to measure visual acuity. The chart consists of rows of letters that decrease in size as you move down the chart. **

**The Snellen Chart is typically found in a doctor's office or eye clinic. It is usually hung on a wall at a specific distance, often 20 feet away from the patient. The patient is then asked to read the letters on the chart, starting from the top row and moving down as far as they can until they can no longer distinguish the letters. The results are then recorded as a fraction, with the top number representing the distance at which the chart was viewed and the bottom number representing the distance at which a person with normal vision could read the same line. **

**The Snellen Chart is a valuable tool in assessing visual acuity and can help detect any issues with vision such as nearsightedness or farsightedness. It is also used to determine if a person needs corrective lenses or if their current prescription needs to be adjusted. **

**If you are interested in learning more about the Snellen Chart and how it is used to assess vision, you can visit the American Academy of Ophthalmology website at [www.aao.org](https://www.aao.org/). This site provides detailed information on eye health and vision testing, including the use of the Snellen Chart. **

**Overall, the Snellen Chart plays a crucial role in evaluating visual acuity and identifying any potential vision problems. If you are scheduled for an eye exam, be sure to look out for this chart in the doctor's office. It may be the key to ensuring you have optimal vision and eye health.

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