To determine a person's vision, healthcare professionals use which chart?

The Snellen chart is specifically designed for measuring visual acuity, which assesses how well a person can see at a distance. This chart typically features letters of varying sizes, where individuals are asked to read the smallest line they can see clearly from a standardized distance, usually 20 feet. The results are expressed as a fraction, with 20/20 considered normal vision.

While other charts also evaluate aspects of vision, they serve different purposes. For instance, the LogMAR chart is utilized for more precise measurements of visual acuity in clinical settings, but the Snellen chart is more commonly recognized and used in routine eye examinations. The Farnsworth D-15 test is specifically designed for color vision testing, assessing an individual’s ability to distinguish between colors. The Jaeger chart, on the other hand, primarily tests near vision, often used for evaluations related to reading or close work. Thus, for a general assessment of distance vision, the Snellen chart is the most appropriate tool.