Objectives 16-18

Question 1

what is miosis?

Answer 1

parasympathetic constriction of radial muscles for close vision

Question 2

what is the term for farsightedness?

Answer 2

hyperopia

Question 3

which cranial nerve transmits vision info from brain to eyes?

Answer 3

CN III oculomotor

Question 4

what is the term for nearsightedness?

Answer 4

myopia

Question 5

which tunic is the fibrous layer of the eye?

Answer 5

sclera

Question 6

which 2 cranial nerves are involved in pupillary reflex?

Answer 6

CN II and III

Question 7

what causes hyperopia?

Answer 7

eye is short; light rays converge too late

Question 8

which drugs have an increased effect on miosis?

Answer 8

cholinergic

Question 9

condition in which there is asymmetry between the cornea and lens

Answer 9

astigmatism

Question 10

area of the eye with the greatest concentration of cones, acuity, and color vision

Answer 10

fovea centralis

Question 11

which tunic is the neurovascular layer of the eye?

Answer 11

choroid

Question 12

which drugs have an increased effect on mydriasis

Answer 12

adrenergic

Question 13

which cranial nerve transmits light info from eyes to brain?

Answer 13

CN II optic

Question 14

how do the eye muscles respond for distance vision?

Answer 14

relaxation of ciliary and radial muscles; suspensory ligaments tense

Question 15

what are the 2 types of muscle that move the pupil?

Answer 15

circular and radial muscles

Question 16

what are the 3 tunics of the eye, from deep to superficial?

Answer 16

retina, choroid, sclera

Question 17

age-related near-vision loss when the lens becomes less elastic

Answer 17

presbyopia

Question 18

which muscle of the iris is responsible for miosis?

Answer 18

circular muscle

Question 19

which cranial nerve is involved with miosis?

Answer 19

parasympathetic fibers of oculomotor

Question 20

process by which the lens changes its degree of convexity

Answer 20

accomodation

Question 21

which muscle of the iris is responsible for mydriasis?

Answer 21

radial muscle

Question 22

what shape is the lens for distance vision?

Answer 22

flat

Question 23

what is mydriasis?

Answer 23

sympathetic dilation of radial muscles for distance vision

Question 24

how do the eye muscles respond for close vision?

Answer 24

contraction of ciliary and radial muscles; suspensory ligaments relax

Question 25

what is the word for normal vision?

Answer 25

emmetropia

Question 26

what causes myopia?

Answer 26

eye is elongated; light rays converge too early

Question 27

what shape is the lens for close vision?

Answer 27

round