RST 230 EXAM 3 | QUESTIONS AND ANSWERS |
2025/2026 ALREADY PASSED!!
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
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
acuity Answer - described amount of detail an individual sees compared to a
normal eye
visual field Answer - includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
tunnel vision Answer - can see straight ahead but not to the sides
peripheral vision Answer - cannot see straight ahead, can only see peripheral
tunnel vision Answer - cannot see to the sides only straight ahead
ocular dominance Answer - the tendency to prefer visual input from one eye
to the other
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
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
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
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
major causes of visual impairments Answer - -Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
, 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
hearing impairment Answer - general term used to describe all types of
hearing loss, ranging from very mild to profound deafness.
deafness 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 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 Answer - you lose your hearing before speech develops
post lingual Answer - you lose your hearing after you have learned how to
speak
Rh incompatibiltiy 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 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 Answer - -**most common type of hearing loss**,
"nerve deafness"
-Can be a result of aging, high childhood fevers, high levels of noise, viral
infections
-Occur in cochlea and vestibular organs and nerve endings
-Damage of nerves from cochlea to brain
2025/2026 ALREADY PASSED!!
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
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
acuity Answer - described amount of detail an individual sees compared to a
normal eye
visual field Answer - includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
tunnel vision Answer - can see straight ahead but not to the sides
peripheral vision Answer - cannot see straight ahead, can only see peripheral
tunnel vision Answer - cannot see to the sides only straight ahead
ocular dominance Answer - the tendency to prefer visual input from one eye
to the other
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
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
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
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
major causes of visual impairments Answer - -Trauma to the eye
-Aging
-Congenital
-Disease
-Accidents
, 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
hearing impairment Answer - general term used to describe all types of
hearing loss, ranging from very mild to profound deafness.
deafness 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 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 Answer - you lose your hearing before speech develops
post lingual Answer - you lose your hearing after you have learned how to
speak
Rh incompatibiltiy 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 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 Answer - -**most common type of hearing loss**,
"nerve deafness"
-Can be a result of aging, high childhood fevers, high levels of noise, viral
infections
-Occur in cochlea and vestibular organs and nerve endings
-Damage of nerves from cochlea to brain
