RST 230 EXAM 3 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. legally blind
Answer:
if his vision in the better eye, even with glasses or contact lenses, is no better than 20/200 or if his visual
field has a maximum diameter of 20 degrees
Question:
2. visually impaired, partially sighted, or low vision
Answer:
describe a serious loss of vision that cannot be corrected by medical or surgical procedures or with
conventional eyeglasses
Question:
3. acuity
Answer:
described amount of detail an individual sees compared to a normal eye
Question:
4. visual field
Answer:
includes entire area that can be seen at one time with the fixed eye
-Normal vision is 170 degrees roughly
Question:
5. tunnel vision
Answer:
can see straight ahead but not to the sides
Question:
6. peripheral vision
Answer:
cannot see straight ahead, can only see peripheral
Question:
7. tunnel vision
Answer:
cannot see to the sides only straight ahead
Question:
8. ocular dominance
Answer:
the tendency to prefer visual input from one eye to the other
, Question:
9. the miles test
Answer:
Used to test dominant eye; triangle with hand, close one eye, the eye that doesn't move is the dominant eye
Question:
10. cataracts
Answer:
-lens becomes milky or cloudy and this cloudiness distorts rays of light and prevents light from being
focused on the retina
-Primary cause of blindness among other adults
-Symptoms: Blurred vision Double vision Poor night vision Need for bright lights when reading
-Causes: Lack of oxygen - disturbance in the nutrition of the lens
Question:
11. glaucoma
Answer:
-Caused by increased pressure within the eyeball
-A liquid builds up and increases pressure within the eye
-Such increased pressure can damage the optic nerve
-Symptoms: Loss of peripheral vision Sensitivity to light and glare
Question:
12. diabetic retinopathy
Answer:
-Diabetes causes changes in blood vessels in the retina that cause hemorrhaging
-One of the most common causes of visual impairments and blindness in the US
-Symptoms: Spots floating in the visual field Vision loss Blurred vision Poor night vision
Question:
13. major causes of visual impairments
Answer:
-Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
Question:
14. sighted guide technique
Answer:
-A blind person's right hand will grip your left elbow
-Keep your arm close to your body
-Blind person will travel half step behind you
-Keep the person aware of conditions or changes in surroundings, mention curbs stairs etc
CORRECT ANSWERS
Question:
1. legally blind
Answer:
if his vision in the better eye, even with glasses or contact lenses, is no better than 20/200 or if his visual
field has a maximum diameter of 20 degrees
Question:
2. visually impaired, partially sighted, or low vision
Answer:
describe a serious loss of vision that cannot be corrected by medical or surgical procedures or with
conventional eyeglasses
Question:
3. acuity
Answer:
described amount of detail an individual sees compared to a normal eye
Question:
4. visual field
Answer:
includes entire area that can be seen at one time with the fixed eye
-Normal vision is 170 degrees roughly
Question:
5. tunnel vision
Answer:
can see straight ahead but not to the sides
Question:
6. peripheral vision
Answer:
cannot see straight ahead, can only see peripheral
Question:
7. tunnel vision
Answer:
cannot see to the sides only straight ahead
Question:
8. ocular dominance
Answer:
the tendency to prefer visual input from one eye to the other
, Question:
9. the miles test
Answer:
Used to test dominant eye; triangle with hand, close one eye, the eye that doesn't move is the dominant eye
Question:
10. cataracts
Answer:
-lens becomes milky or cloudy and this cloudiness distorts rays of light and prevents light from being
focused on the retina
-Primary cause of blindness among other adults
-Symptoms: Blurred vision Double vision Poor night vision Need for bright lights when reading
-Causes: Lack of oxygen - disturbance in the nutrition of the lens
Question:
11. glaucoma
Answer:
-Caused by increased pressure within the eyeball
-A liquid builds up and increases pressure within the eye
-Such increased pressure can damage the optic nerve
-Symptoms: Loss of peripheral vision Sensitivity to light and glare
Question:
12. diabetic retinopathy
Answer:
-Diabetes causes changes in blood vessels in the retina that cause hemorrhaging
-One of the most common causes of visual impairments and blindness in the US
-Symptoms: Spots floating in the visual field Vision loss Blurred vision Poor night vision
Question:
13. major causes of visual impairments
Answer:
-Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
Question:
14. sighted guide technique
Answer:
-A blind person's right hand will grip your left elbow
-Keep your arm close to your body
-Blind person will travel half step behind you
-Keep the person aware of conditions or changes in surroundings, mention curbs stairs etc
