What is the average distance for distance vision tests during an exam?

The average distance for distance vision tests during an exam is typically 20 feet. This standardized distance is used because it is considered optimal for evaluating how well a patient can see at a distance, which is important for determining their visual acuity.

Testing at this distance aligns with the design of the Snellen chart, which is often used in these evaluations. The distance of 20 feet allows for a clear assessment of visual capability in a setting that mimics real-world scenarios where distance vision is frequently required, such as driving or watching television. While shorter distances might be used in some contexts, particularly in smaller office settings, 20 feet remains the most widely accepted standard in optometry for distance vision testing.