Eye Chart (Snellen Chart)

An eye chart, commonly known as a Snellen chart, is a tool used to measure visual acuity, which is how well you can see. It features rows of letters, numbers, or symbols that decrease in size from top to bottom. During an eye exam, you cover one eye and read the smallest row of letters you can see clearly. The results help determine your vision status, expressed as a fraction (e.g., 20/20), where the first number represents the testing distance, and the second indicates the smallest line you can read. This information assists in diagnosing vision issues.