Question

Define the critical link screening for vision?

A) Identifying visual impairments early
B) Assessing eye color
C) Evaluating visual acuity
D) Testing peripheral vision

Answer 1

Testing vision relies on the Snellen chart to measure visual acuity and assess peripheral vision boundaries. Physical inspection of the optic disk can also be done.

Step-by-step explanation:

Testing vision relies on the tests that are common in an optometry office. The Snellen chart demonstrates visual acuity by presenting standard Roman letters in a variety of sizes. The result of this test is a rough generalization of the acuity of a person based on the normal accepted acuity, such that a letter that subtends a visual angle of 5 minutes of an arc at 20 feet can be seen.

Testing the extent of the visual field means that the examiner can establish the boundaries of peripheral vision as simply as holding their hands out to either side and asking the patient when the fingers are no longer visible without moving the eyes to track them. If it is necessary, further tests can establish the perceptions in the visual fields. Physical inspection of the optic disk, or where the optic nerve emerges from the eye, can be accomplished by looking through the pupil with an ophthalmoscope.