Final 46 Flashcards Preview

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Flashcards in Final 46 Deck (30):
1

Rods

Low light
Peripheral vision

2

Cones

Bright light
Color
Central vision

3

Glaucoma

Increased pressure resulting in hypoxia of photoreceptors and nerve fibers

4

Movement of the eye

6 vouluntary muscles
Cranial nerves 3, 4, 6

5

Emmetropia

Perfect refraction of the eye

6

Hyperopia

Farsightedness
Eye does not refract enough light

7

Myopia

Nearsightedness
Overbends the light

8

Astigmatism

Refractive error caused by unevenly curved surfaces on or in the eye, especially the cornea

9

Miosis

Pupillary constriction

10

Mydriasis

Pupillary dilation

11

Accommodation

Haze is shifted from a distant to near object

12

Convergence

Ability to turn both eyes inward

13

Arcus senilis

Opaque, bluish white ring within out edge of cornea. Caused by fat deposits

14

Presbyopia

40 eyes

15

Ishihanra chart

Color vision

16

Snellen chart

Letter chart

17

Systemic conditions that effect the eye

Diabetes
Hypertension
AIDS
Thyroid
Lupus

18

Drugs that affect the eye

Antihistamines
Decongestants
Antibiotics
Anticholenergic
Opioids

19

Nutrition

Fruit
Red, orange and dark green vegetables
Lutein, beta carotene

20

Cataract

Decreased water
Increased density of lens
Painless

21

PERRLA

Pupils equal round reactive to light and accommodative

22

Near vision test

Rosenbaum pocket vision screener
Jaeger card
Hold 14 inches away

23

Normal pupil diameter

3-5 mm

24

Nystagmus normal

Normal finding for far lateral gaze

25

CT scan

Bone structures
Tumor
Muscles

26

Slit lamp examination

Magnifies anterior eye chambers

27

Corneal staining

Ulcers
Foreign body
Trauma

28

Tonometry

Measure IOP
Normal 10-21

29

Fluorescein angiography

Eye circulation

30

Electroretinogtaphy

Rentias response to light stimulation
Blood vessel changes from drugs