Chapter 10-2

Question 0

Enzyme in tears that is antibacterial to reduce risk of eye infections

Answer 0

Lysozyme

Question 1

Mucus membrane that lines the eyelids inner surface and covers anterior surface of eyeball

Answer 1

Conjunctiva

Question 2

Function of the extrinsic muscle move eyes in various directions (6)

Answer 2

Superior rectus-rotate eye upward and toward midline
Inferior rectus-rotate eye downward and toward midline
Medial rectus-rotate eye inward toward midline
Lateral rectus-rotate eyes away from midline
Superior oblique-rotates eyes downward and away from midline
Inferior oblique-rotate upward and away from midline

Question 3

Anterior, transparent window of eye that allows light rays to enter

Answer 3

Cornea

Question 4

Outer white part of eye

Answer 4

Sclera

Question 5

Vascular layer that contains pigment to keep inside of eye dark

Answer 5

Choroid coat

Question 6

Thickest part, extends forward from choroid coat

Answer 6

Ciliary body

Question 7

Transparent disk behind pupil for focusing

Answer 7

Lens

Question 8

Ability of lens to change shape for focusing

Answer 8

Accommodation

Question 9

Colored part of eye

Answer 9

Iris

Question 10

Watery fluid between cornea and iris which helps nourish and maintain shape of cornea

Answer 10

Aqueous humor

Question 11

Opening in iris for light to enter eye

Answer 11

Pupil

Question 12

Thin delicate membrane which contains visual receptor cells

Answer 12

Retina

Question 13

Depression in center of retina that produces sharpest vision

Answer 13

Fovea centralis

Question 14

Region that lacks receptor cells

Answer 14

Optic disc

Question 15

Transparent jelly like fluid in posterior cavity and helps maintain shape of eye

Answer 15

Vitreous humor

Question 16

Bending of a beam of light as it passes from one medium to another

Answer 16

Light refraction

Question 17

What’s the difference between convex and concave

Answer 17

Convex surface causes light waves to converge outward

Concave surface causes light waves to converge inward

Question 18

Differ between rods and cones

Answer 18

Cones-sharp images; Rods-general outline of objects
Rods-hundred times more sensitive to light than Cones
Rods-colorless vision; cones-detect color

Question 19

Sharpness or degree of detail the eye can see

Answer 19

Visual acuity

Question 20

4 factors of visual acuity

Answer 20

Brightness, size of object, color of object, retinal area on which image of object falls

Question 21

Light sensitive chemical in rods that breaks down into the protein opsin and retinal which is made from vitamin A

Answer 21

Rhodopsin

Question 22

Name and define characteristics of color vision

Answer 22

Hue-sensory response made by our eyes to various wavelengths
Saturation-quality of color dependent on amount of white light present
Brightness-intensity of light waves reflected by surface

Question 23

Purkinje shift is what

Answer 23

Shift from light to dark adaptation and vice versa

Question 24

Carry over of visual impressions

Answer 24

After image

Question 25

Eye disorder explain astigmatism

Answer 25

Abnormal curvatures of the surface of cornea or lens

Question 26

Eye disorder explain myopia

Answer 26

Eyeball is too long from front to back

Question 27

Eye disorder explain hyperopia

Answer 27

Eyeball is too short from front to back

Question 28

Eye disorder explain presbyopia

Answer 28

Decline in usual accommodation with age

Question 29

Eye disorder explain color blindness

Answer 29

Deficiency in color perception

Question 30

Eye disorder explain cataract

Answer 30

Clouding of the lens

Question 31

Eye disorder explain glaucoma

Answer 31

Amount of aqueous humor increases and eyeball becomes hard

Question 32

Eye disorder explain conjunctiva

Answer 32

Inflammation of conjunction