Week 4 Visual Acuity Testing

Question 1

what three questions should you ask prior to giving a visual acuity exam?

Answer 1

1. do you wear corrective lenses (do exam with lenses on and off)
2. do you have any other viision issues that may alter results
3. do you wear reading glasses; cant be used on exam

Question 2

bob has 20/200 vision, what does that mean?

Answer 2

he can read at 20 feet what most people can read at 200 feet

Question 3

what is an occluder?

Answer 3

used to cover the eye that is not going to be used for the exam

Question 4

what is your role during the visual acuity test? 3

Answer 4

keep focus ON patient (make sure they are remaining at 20 feet and have occluder over eye), calm nerves, ENCOURAGE dont ASSESS

Question 5

what is the chart called that is used during eye exams?

Answer 5

snellen chart

Question 6

what is visual acuity?

Answer 6

sharpness of vision

Question 7

how far does a person have to be from the snellen chart?

Answer 7

20 feet

Question 8

where do you look when giving a visual acuity test?

Answer 8

at the patient, do not point to lines or symbols

Question 9

what are the steps to giving a visual acuity test?

Answer 9

1. 20 feet from snellen chart
2. have patient completely occlude one eye (note)
3. ask patient to read letters beginning at mid chart (line 4 or 5)
4. if misses 1 or zero read next line down, if misses 2 or more move up a line
5. work down chart to last line the pt reads with 75% accuracy
6. repeat for other eye then both eyes
7. record

Question 10

the visual accuity exam is not complete until…

Answer 10

documentation

Question 11

what three conditions do you evaluate in pediatric eye testing?

Answer 11

strabismus (crossed eye), ambylopia (lazy eye), refractive errors (near sighted/far sighted)

Question 12

in infants

Answer 12

red reflex, eye alignment, eye movement

Question 13

what tests for visual acuity can you use for children 3-5?

Answer 13

allen chart (familiar pics), tumbling E chart

Question 14

what tests for visual acuity can you use for children >5? (2)

Answer 14

HOTV chart, snellen chart

Question 15

a child 3-4 yo should not have eyesight worse than

Answer 15

20/40

Question 16

4-school age should not have sight worse than

Answer 16

20/30

Question 17

school age kids should have what sight?

Answer 17

20/20

Question 18

what are the two main eye issues in elderly?

Answer 18

cataracts, macular degeneration

Question 19

what test is used to screen for macular degernation?

Answer 19

pinhole test w/ Amsler grid

Question 20

what test is used to screen for vision loss associated with retina?

Answer 20

Fundoscopy

Question 21

what is Glaucoma? how is it treated?

Answer 21

too much pressure/fluid in eye that damages ocular nerve and causes blindness