Question

Individuals are considered legally blind if their visual acuity is ___ or less even with corrective lenses, and partially sighted if their visual acuity is?

a) 20/20; 20/40
b) 20/40; 20/20
c) 20/200; 20/70
d) 20/70; 20/200

Answer 1

Individuals are considered legally blind if their visual acuity is 20/200 or less even with corrective lenses, and partially sighted at 20/70, making option (c) the correct answer.

Step-by-step explanation:

Individuals are considered legally blind if their visual acuity is 20/200 or less even with corrective lenses, and partially sighted if their visual acuity is 20/70. Therefore, the correct answer to the student's question is (c) 20/200; 20/70. Vision tests such as those using the Snellen chart help determine if an individual has normal visual acuity, such that a letter that subtends a visual angle of 5 minutes of arc at 20 feet is visible to them. For a person with 20/200 vision, the smallest letter they can discern at 20 feet could be seen by a person with normal acuity from 200 feet away.