Lecture 3: Visual Deficits Flashcards Preview

OCP With Older Adults > Lecture 3: Visual Deficits > Flashcards

Flashcards in Lecture 3: Visual Deficits Deck (36):
1

Concave lens= _______

Minus

2

Diopter ____-____ power

Light bending

3

Convex lens=___

Plus

4

Refraction is the way in which light

Bends as it travels from one transparent medium to another of a different density

5

Cornea(40 diopters)+lens(20 diopters)=____________

60 Diopters

6

Hyperopia is _____-sighted

Far

7

In hyperopia the lens ______ have enough light bending power

Does not

8

Myopia is _____-sighted

Near

9

In hyperopia the lens ______ light bending power or the eyeball is _______

Has too much
Too long

10

Astigmatism is when the cornea is

Not spherical

11

A ________ lens is used to correct am astigmatism

Spherical

12

Presbyopia is

The need for vision correction when you get older

13

With presbyopia, you can see _____ but _____ images are blurred

Distance
Close

14

With presbyopia there's not enough _________

Accomodation

15

Normal age-related eye changes

Declining sensitivity, color perception, and contrast sensitivity.
Dryness-not enough tears
Decreases resistance to glare (tolerance 2.5x times greater at age 20 than 65)
Needing more time to adjust to different levels of light.

16

True or false: low vision is a normal part of aging?

False

17

Best possible correction for low vision is between ___ and ___

20/60
20/400

18

___________ is the leading cause of vision loss in Americans over 60

Macular degeneration (aka age-related maculopathy)

19

Macular degeneration is characterized by the gradual degeneration of the _____ cells

Cone

20

What are the two types of macular degeneration?

Wet or dry

21

Dry M.D is characterized by?

Atrophy of the retinal cells, seen as hypopigmentation of the retinal pigment epithelium

22

Wet M.D is characterized by

Exudate, scars, and rupture of blood vessels

23

Treatment is only for ____ M.D

Wet

24

The primary impact of M.D is on _____ vision

Central

25

M.D is characterized by

Areas of blurred vision, shadows, dark spots, or distortions

26

Diabetic retinopathy is the ______ cause of NEW vision loss in American adults between 20 and 74

leading

27

Almost 100% of people with type 1 diabetes and ___ of people with type 2 diabetes will develop some form of diabetic retinopathy

70%

28

What are the two types of diabetic retinopathy

Proliferative, non-proliferative

29

The more serious proliferative DR is associated with

New blood vessel growth, abnormal blood cells, etc.

30

True or false: macular edema can exist at any stage of DR

True

31

Damage to the optic nerve can be caused by increased pressure in the ______ segment, but no ______ is felt

Anterior
Pain

32

In glaucoma, _____ vision is affected, but often goes ______

Peripheral
Unnoticed

33

Treatment consists of medications (to slow aqeueous production)

Ok

34

__________ surgery is the most common surgery in the united states

Cataract

35

Cataracts are characterized by the proteins acumulated in the lens _______ together

Clumping

36

_______ is the leading cause of reversible blindness in developing countries

Cataracts