Chapter 8 Part 1 (Eye and Vision)

Question 1

What is the conjunctiva of the eye?

Answer 1

A protective mucous membrane lining the eyelids

Question 2

What is the function if the lacrimal apparatus?

Answer 2

Drain tears into the nasal cavity

Question 3

The eyes outer most layer is the ____ and it consists the ____?

Answer 3

1. Fibrous layer
2. Sclera and cornea

Question 4

The eyes middle layer is the ____ and it consists of the ____?

Answer 4

1. Vascular layer
2. Choroid, ciliary body and iris

Question 5

The eyes innermost layer is the ____?

Answer 5

1. Sensory layer

Question 6

What is cataracts?

Answer 6

Partial or Complete lass off transparency of the crystalline lens of the eye

Question 7

What is glaucoma?

Answer 7

Abnormal increase of the pressure within the eye causing damage to the optic nerve resulting in vison loss

Question 8

What is refraction?

Answer 8

Bending of light

Question 9

What is accommodation?

Answer 9

Changes in eye optical power to maintain a clear image or focus on an object as its distance varies

Question 10

What is the cause of astigmatism?

Answer 10

Occurs when either the front surface of the eye (cornea) or the lens inside the eye has mismatched curves.

Question 11

What is emmetropia?

Answer 11

To naturally have perfect vision (20/20)

Question 12

What causes hyperopia?

Answer 12

When your eyeball grows too short from front to back, or when there are problems with the shape of your cornea. (Farsightedness)

Question 13

What causes myopia?

Answer 13

When your eyeball is too long or the cornea or the protective outer layer of your eye is too curved (Nearsightedness)

Question 14

What is the photopupillary reflex?

Answer 14

Protective reflex that constricts the pupil upon exposure to bright light to prevent damage to the photoreceptors

Question 15

What is convergence?

Answer 15

Reflexive movement of the eyes medially when we view close objects

Question 16

What is the outer ear composed of?

Answer 16

1. Auricle
2. External acoustic meatus

Question 17

What is the auricle?

Answer 17

The shell shaped structure surrounding the auditory canal opening

Question 18

What is the external acoustic meatus?

Answer 18

Tunnel like hole in the temporal bine where sound enters the ear

Question 19

What is the middle ear cavity?

Answer 19

Open cavity medial to the tympanic membrane containing tiny bones the transmit sound to the inner ear.

Question 20

The maze of bony chambers in the internal ear are called the?

Answer 20

Bony labyrinth

Question 21

What are the tree subdivisions of the bony labyrinth?

Answer 21

1. Cochlea
2. Vestibule
3. Semicircular canals

Question 22

The bony labyrinth is filled with a fluid called?

Answer 22

Perilymph