Module 7: Chapter 15 - Eyes

Question 1

What are the extraocular muscles?

Answer 1

The six muscles that control the movements of the eyes. Innervated by three cranial nerves

Question 2

the location in the brain were optic nerve fibers from the Temporal field of vision crossover is identified as the

Answer 2

Optic chasm

Question 3

Define pupillary light reflexes

Answer 3

Normal construction of the pupil when bright light shines on the retina

• it is a reflex
• related to cranial nerves

Question 4

Define fixation

Answer 4

Eye directs to an object

- Relates to eye muscles and cranial nerves

Question 5

Define accommodation

Answer 5

Adaptation of eye to near object

Question 6

What are the three most common causes of decreased visual functioning in older adults?

Answer 6

Cataracts, glaucoma diabetic retinopathy, and macular degeneration

Question 7

With the Snellen chart, larger the denominator means

Answer 7

The poorer the vision

Question 8

What is the difference between phoria and tropia?

Answer 8

Tropia is a misalignment of the two eyes when a patient is looking with both eyes and uncovered
Phoria - Only appears when binocular viewing is broken and the two eyes are no longer looking at the same object