Chapter 17 - Important Slides

Question 1

Which cones are most affected by color blindness?

Answer 1

Either the red or green cones.

Question 2

There are 3 types of cones, each stimulated by one of the primary colors of light. What colors are they?

Answer 2

Red, blue, and green

Question 3

What is the thalamus?

Answer 3

1. Relay center of the brain

2. Optic nerve fibers pass through the thalamus on their way to cerebral cortex

Question 4

What is hemianopsia?

Answer 4

Absence of vision for one half, right or left, of an individual’s field of vision

Question 5

What is the pathway of light entering the eye to brain? Start with the eyes…

Answer 5

Cornea —>Anterior chamber and aqueous humor —> pupil

—>lens —>Vitreous chamber and vitreous humor —> Retina

Question 6

What is the pathway of light entering the eyes to brain? Start with the brain part…

Answer 6

From retina —> Optic nerve fibers —> Optic Chiasm —> Thalamus —>Cerebral cortex

Question 7

What is astigmatism?

Answer 7

Defective curvature of the cornea or lens of the eye.

Question 8

What is hyperopia (hypermetropia)?

Answer 8

Farsightedness. Objects are blurry up close, but clear in far distances. See clear far away in distance.

Question 9

What is myopia?

Answer 9

Nearsightedness. Objects in the far distance are blurry, but up close is clear.

Question 10

What is presbyopia?

Answer 10

Impairment of vision due to old age reducing lens accommodation