Question

Select the medical term that means tool used to measure visual acuity.

a) Ophthalmoscope
b) Tonometer
c) Snellen chart
d) Retinoscope

Answer 1

The Snellen chart is the tool used to measure visual acuity, displaying letters of decreasing size to assess visual sharpness at a standard distance.

Step-by-step explanation:

The medical term that means tool used to measure visual acuity is c) Snellen chart. The Snellen chart is a standardized arrangement of letters of decreasing size used to test visual acuity. The Snellen chart utilizes standard Roman letters presented at a distance of 20 feet, where the line of letters that subtend 5 minutes of an arc represents the smallest letters a person with normal vision should be able to read. For instance, 20/60 vision indicates that the smallest row of letters that someone can identify at 20 feet, a person with normal vision could discern from 60 feet away. This chart is a fundamental tool in assessing visual sharpness and is commonly used in optometry.