Which statement best describes the Snellen eye chart?

• A. Phoric
• B. Snellen eye chart
• C. Residual vision
• D. Braille embosser

Answer: (B)

Measuring how clearly a person sees at a distance is what this is about. The Snellen eye chart is the standard tool used to do that. It consists of rows of letters that get progressively smaller. During the test, you stand at a fixed distance—usually 20 feet (about 6 meters)—and read the letters aloud. The smallest line you can identify accurately gives your visual acuity, often written as a ratio like 20/20. This chart is specifically designed to assess distance vision and is a staple of eye exams.

Other options don’t describe this chart. A term like phoric isn’t a chart used to measure acuity, residual vision refers to the remaining usable vision rather than a testing method, and a Braille embosser is a device for producing tactile Braille, not for testing how clearly someone sees. So the Snellen eye chart is the best description.