Low Vision Flashcards
What does the term “low vision” mean?
Vision which is inadequate for the needs of an individual and which cannot be improved by medial or surgical treatment or eyewear.
The estimated low vision population of the US has increased from 9 million to 11 million in 2004 to 14 million in 2014. True or false?
True
Legal blindness is generally identified when a person’s best corrected acuity is ____ or less
20/200
An example of functional low vision problems can include:
a.) inability to read the paper or magazine even with corrective eyewear
b.) not being able to see a gas flame when cooking
c.) being unable to safely cross a street
d.) All of the above
d.) All of the above
In addition to reduced visual acuity, a person with low vision may have reduced visual field of ______ or less.
20 degrees
Legally blind categories fall into which category?
a.) Light perception
b.) Light projection
c.) Total blindness
d.) All of the above
d.) All of the above
Define light perception, light projection, and total blindness.
Light perception - the ability to perceive the difference between light and dark
Light projection - the ability to determine the general source and direction of a light
Total Blindness - complete lack of light perception and form perception and is recorded as NLP (No light perception)
If a practitioner doesn’t have a low vision chart for testing, what may be done to test the low vision patient?
Reduce the distance at which the patient is tested
Central vision loss may be monitored by the patient at home with the use of a/an ____ after explaining how to use it.
Amsler Grid
Hereditary diseases account for _____ of impaired vision in the US up to the age of 21 years old.
69%
An example of the first methods for correcting minor low vision difficulties is:
a.) Move object closer to eye
b.) Increase font/object size
c.) Hand held magnifier
d.) All of the above
d.) All of the above
When using magnification as the method of correction, what is the reason NOT to use the highest magnification possible?
The higher the magnification, generally the smaller field of view.
A +8.00 diopter lens would produce a magnification of ____ times
Two
What is the only type of vision correction available for distant viewing for the low vision patient?
Telescope
If a patient’s best corrected acuity is 20/200 and you wish to have them view near at 20/40, what power magnification would you need to have them use?
5 X
