Exam 1 Flashcards
Describe impairment
The deterioration of or weakening of the function of the organ or part
Give an example of impairment
Macular degeneration impairs the macula
Describe disability
When you are impaired and you can’t do your job
Describe a handy cap
You lose function because you are impaired
Moderate visual impairment is described as
Being worse than 20/60 OR 20/70 worse
Does vision impairment mean legal blindness?
NO
Word for word what is criteria 2.02?
Loss of visual acuity: remaining vision in the better eye after best correction is 20/200 or less
Word for word what is criteria 2.03A
Contraction of the visual field in the better eye: the whitest diameter subtending an angle around the point of fixation, no greater than 20°
If you CANNOT read ANY letters on 10/50 line but you can read on the 10/60 or 10/80 are you LEGALLY blind?
Yes
If you are 10/60+1, are you legally blind?
NO
If you are 20/63-2/+1 are you legally blind?
NO
If you are 20/125+1 are you legally blind based on ETDRS chart?
NO
A stimulus on perimeter is 19 dB is this dimmer or bright?
Dimmer
The Framington study tested which group?
Middle class white ppl
The Beaver Dam study tested what group?
Wisconsin white
The Baltimore eye study tested which group?
Urban blacks and whites
Which group had the highest rate of Legal Blibdness based on WHO?
Sub Saharan African. 1.4%
In US adults above 40, how many are legally blind?
0.5%. 1 in 200.
In US adults above 40, how many are FUNCTIONALLY blind?
0.05%. 1 in 2000
A patient is defined as functionally blind if they cannot:
Cannot see Optotypes. HM or worse
What % of Medicare Benificiary are visually impaired?
3%
Among young adult, which gender is most likely to be visually impaired?
Guys
What are the criteria for the Lighthoise definition?
VA worse than 20/60 in the good eye. VF worse than 20 degree along widest meridian. Reduced contrast sensitivity
If a patient only complains of having g issues with their hobbies, is a referral to low vision warranted?
No. Refer only if ADLs are affected
How large are newspaper print based on M notation?
1M
What does fluently mean when it comes to newspaper?
You need double acuity of newspaper
Your patient reads 2M size print at a test distance of 20cm. How is this recorded
0.2/2M
Your patient reads 2M size print at a test distance of 20cm. How is this recorded
0.2/2M
What test distance is referred to as when saying reduced Snellen?
Near
16 point letter size is how much in M notation?
2M
How should you test if your patient has aphakia, pseudophakia, or presbyopia?
Use their near add
Why is single letter performance sometimes better than continuous text?
Crowding effect
When should you check pupils?
After you complete your initial exam.
should you give the highest or lowest powered device to a patient?
Least powerful to achieve goal.
True or false: “dipping” is considered to be trial frame refraction
False. Dipping is not TF Rx
When measuring stenopaic slit, how much should be added to lid thickness?
1mm
