Ch 6 - Eye and Ear Assessment and Procedures

Question 1

irrigation

Answer 1

washing a body canal with a flowing solution

Question 2

instillation

Answer 2

dropping a liquid into a body cavity

Question 3

sclera

Answer 3

outer layer

tough white fibrous connective tissue

Question 4

cornea

Answer 4

transparent covering over colored part of eye

Question 5

choroid

Answer 5

middle layer of eye
composed of many blood vessels and is highly pigmented

pigments absorb stray light rays
blood nourish the outer layers of the eye

Question 6

ciliary body

Answer 6

front part of the choroid

contains muscles that control the shape of the lens

Question 7

suspensory ligaments

Answer 7

suspend lens in place

Question 8

lens

Answer 8

focusing the light rays on the retina

Question 9

retina

Answer 9

third and innermost layer
light rays focus on retina
and transmitted to the brain via the optic nerve to be interpreted

Question 10

anterior chamber

Answer 10

area between the cornea and iris

Question 11

posterior chamber

Answer 11

area between the iris and lens

Question 12

aqueous humor

Answer 12

fills both anterior and posterior chambers

Question 13

vitreous humor

Answer 13

fills the eyeball between the lens and the retina

helps maintain the shape of the eyeball

Question 14

conjunctiva

Answer 14

membrane that lines the eyelids and covers the front of the eye except the cornea

covering the sclera is transparent except for some capillaries, which allow the white sclera to show through

Question 15

refraction

Answer 15

ability of the eye to bend the parallel light rays coming into it so it can be focused on the retina

Question 16

myopia

Answer 16

nearsighted

eyeball is too long from front to back causing light rays to be brought to a focus in front of the retina

Question 17

hyperopia

Answer 17

farsighted

eyeball is too short from front to back resulting in a different type of refractive error in which the light rays are brought behind the retina

Question 18

astigmatism

Answer 18

refractive error that causes distorted and blurred vision for both near and far objects

cornea is a oval shape rather than spherical

light rays focuses on two different points

often occurs in combination with myopia and hyperopia

Question 19

presbyopia

Answer 19

decreases in the elasticity of the lens of the eye begins to occur after the age 40 years

decreased ability to focus clearly on close objects

Question 20

snellen test

Answer 20

20/20 normal

20/30 you read at 20 while others read at 30 - worse than normal vision

20/15 you read at 20 ft while others read at 15 - better than normal vision

Question 21

ishihara test

Answer 21

a book to test for colorblind test