What Tool is Used to Measure Visual Acuity

Question

What tool is used to measure visual acuity?
A) ophthalmoscope
B) astigmatism test chart
C) Snellen eye chart
D) none of the above

Accepted Answer

The Snellen eye chart is widely used to measure visual acuity. It consists of lines of letters or numbers of different sizes that are viewed from a standardized distance. The smallest line of characters that the person can read accurately indicates their visual acuity. Ophthalmoscope and astigmatism test charts are not used to measure visual acuity.