RST 230 Exam 3 ACTUAL QUESTIONS
AND CORRECT ANSWERS
Legally blind - CORRECT 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
Visually impaired, partially sighted, or low vision - CORRECT ANSWER describe a serious
loss of vision that cannot be corrected by medical or surgical procedures or with conventional
eyeglasses
Acuity - CORRECT ANSWER described amount of detail an individual sees compared to a
normal eye
Visual field - CORRECT ANSWER includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
Tunnel vision - CORRECT ANSWER can see straight ahead but not to the sides
Peripheral vision - CORRECT ANSWER cannot see straight ahead, can only see peripheral
Tunnel vision - CORRECT ANSWER cannot see to the sides only straight ahead
Ocular dominance - CORRECT ANSWER the tendency to prefer visual input from one eye to
the other
The miles test - CORRECT ANSWER Used to test dominant eye; triangle with hand, close one
eye, the eye that doesn't move is the dominant eye
Cataracts - CORRECT 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
Glaucoma - CORRECT 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
Diabetic retinopathy - CORRECT 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
Major causes of visual impairments - CORRECT ANSWER -Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
, Sighted guide technique - CORRECT 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
Hearing impairment - CORRECT ANSWER general term used to describe all types of hearing
loss, ranging from very mild to profound deafness.
Deafness - CORRECT ANSWER state occurring when a person is unable to understand speech
through the ear alone, either with or without a hearing aid.
Hard of hearing - CORRECT ANSWER people who have mild to moderate hearing loss
resulting in decreased perception of conversational speech, but sufficient hearing to permit
understanding under optimal circumstances.
Pre lingual - CORRECT ANSWER you lose your hearing before speech develops
Post lingual - CORRECT ANSWER you lose your hearing after you have learned how to speak
Rh incompatibiltiy - CORRECT ANSWER When a woman is negative and a man is positive
and they produce a positive baby → protein on your red blood cells?? Confused
Conductive hearing loss - CORRECT ANSWER -Outer ear or middle ear
-The most common cause of conductive hearing loss is blocked ear canals
Ex. Ear wax, barbie shoes
-Second cause = punctured ear canals
-Otosclerosis → softening and calcification of the three middle ear bones
Sensorineural hearing loss - CORRECT ANSWER -**most common type of hearing loss**,
"nerve deafness"
-Can be a result of aging, high childhood fevers, high levels of noise, viral infections
AND CORRECT ANSWERS
Legally blind - CORRECT 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
Visually impaired, partially sighted, or low vision - CORRECT ANSWER describe a serious
loss of vision that cannot be corrected by medical or surgical procedures or with conventional
eyeglasses
Acuity - CORRECT ANSWER described amount of detail an individual sees compared to a
normal eye
Visual field - CORRECT ANSWER includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
Tunnel vision - CORRECT ANSWER can see straight ahead but not to the sides
Peripheral vision - CORRECT ANSWER cannot see straight ahead, can only see peripheral
Tunnel vision - CORRECT ANSWER cannot see to the sides only straight ahead
Ocular dominance - CORRECT ANSWER the tendency to prefer visual input from one eye to
the other
The miles test - CORRECT ANSWER Used to test dominant eye; triangle with hand, close one
eye, the eye that doesn't move is the dominant eye
Cataracts - CORRECT 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
Glaucoma - CORRECT 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
Diabetic retinopathy - CORRECT 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
Major causes of visual impairments - CORRECT ANSWER -Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
, Sighted guide technique - CORRECT 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
Hearing impairment - CORRECT ANSWER general term used to describe all types of hearing
loss, ranging from very mild to profound deafness.
Deafness - CORRECT ANSWER state occurring when a person is unable to understand speech
through the ear alone, either with or without a hearing aid.
Hard of hearing - CORRECT ANSWER people who have mild to moderate hearing loss
resulting in decreased perception of conversational speech, but sufficient hearing to permit
understanding under optimal circumstances.
Pre lingual - CORRECT ANSWER you lose your hearing before speech develops
Post lingual - CORRECT ANSWER you lose your hearing after you have learned how to speak
Rh incompatibiltiy - CORRECT ANSWER When a woman is negative and a man is positive
and they produce a positive baby → protein on your red blood cells?? Confused
Conductive hearing loss - CORRECT ANSWER -Outer ear or middle ear
-The most common cause of conductive hearing loss is blocked ear canals
Ex. Ear wax, barbie shoes
-Second cause = punctured ear canals
-Otosclerosis → softening and calcification of the three middle ear bones
Sensorineural hearing loss - CORRECT ANSWER -**most common type of hearing loss**,
"nerve deafness"
-Can be a result of aging, high childhood fevers, high levels of noise, viral infections
