Definition of Absolute Visual Acuity:

Absolute Visual Acuity refers to the highest level of visual acuity that an individual can achieve under ideal viewing conditions. It is a measure of the eye’s ability to discern fine details with accuracy and clarity.

The Snellen chart is a widely used tool to measure absolute visual acuity. The results are expressed as a fraction, where the numerator represents the testing distance (e.g., 20 feet), and the denominator indicates the distance at which a person with normal vision should be able to read the same line of letters. For example, if someone can read the 20/20 line at 20 feet, their vision is considered normal.

Absolute visual acuity is just one aspect of overall visual function. Other factors, such as contrast sensitivity, color vision, and peripheral vision, also contribute to the overall perception of the visual environment. Regular eye exams are essential to assess various aspects of visual function and detect any potential issues early on.