Question

Phoebie brags to her boy-friend that she scored a "twenty twenty" at the eye doctorâs office today. The boy-friend tells her how proud he is of her, although he doesnât really know what that means. Phoebie is technically referring to her performance on the __________ eye chart.

A. Von Helmholtz
B. Ishihara
C. Snellen
D. Colavita

Answer 1

Answer: C - Snellen

Explanation: A Snellen eye chart is used to measure visual acuity. This chart was developed in 1862 by a Dutch ophthalmologist Herman Snellen.

This chart uses alphanumeric capitals in its 5 by 5 unit grid. An example of the chart is attached.

The Snellen eye chart helps to determine the clarity of one's distance vision and it also helps to determine the legal visual acuity requirement for a valid driver’s license.