Week 4 Visual Acuity Testing Flashcards Preview

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Flashcards in Week 4 Visual Acuity Testing Deck (21)
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1
Q

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

A
  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
2
Q

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

A

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

3
Q

what is an occluder?

A

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

4
Q

what is your role during the visual acuity test? 3

A

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

5
Q

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

A

snellen chart

6
Q

what is visual acuity?

A

sharpness of vision

7
Q

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

A

20 feet

8
Q

where do you look when giving a visual acuity test?

A

at the patient, do not point to lines or symbols

9
Q

what are the steps to giving a visual acuity test?

A
  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
10
Q

the visual accuity exam is not complete until…

A

documentation

11
Q

what three conditions do you evaluate in pediatric eye testing?

A

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

12
Q

in infants

A

red reflex, eye alignment, eye movement

13
Q

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

A

allen chart (familiar pics), tumbling E chart

14
Q

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

A

HOTV chart, snellen chart

15
Q

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

A

20/40

16
Q

4-school age should not have sight worse than

A

20/30

17
Q

school age kids should have what sight?

A

20/20

18
Q

what are the two main eye issues in elderly?

A

cataracts, macular degeneration

19
Q

what test is used to screen for macular degernation?

A

pinhole test w/ Amsler grid

20
Q

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

A

Fundoscopy

21
Q

what is Glaucoma? how is it treated?

A

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

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