An eye chart is used to measure the eye's ability to see details at near and far distances.It is used to evaluate eyesight. The eye tests usually involve reading letters or looking at symbols of different sizes on an eye chart. Usually, each eye is tested by itself. And then both eyes may be tested together, with and without corrective lenses (if you wear them). Types of eye charts include the logMAR chart , Snellen chart , Landolt C , and the Lea test . The Snellen Chart is the commonly used eye chart by the doctors. It has standard size letters and is normally viewed at a test distance of 20 feet. It is used to determine your visual acuity ."Visual" refers to the clarity or clearness of the vision and the word "acuity" comes from the Latin "acuitas" meaning sharpness. Eye Charts are available for very young children or illiterate adults that do not require letter recognition. One version uses simple pictures or patterns. Othe
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