UIUC RST 230 FINAL EXAM
QUESTIONS AND CORRECT
ANSWERS
cataracts ANSW✅✅lens become milky and cloudy and this cloudiness distorts rays of light and
prevents light from being focused on the retina. (symptoms: blurred vision) (causes: lack of oxygen)
glaucoma ANSW✅✅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 (loss of
peripheral vision)
diabetic retinopathy ANSW✅✅diabetes causes changes in blood vessels in the retina that cause
hemorrhaging, one of the most common causes of visual impairments an blindness in the U.S. (spots
floating in the visual field
what are the major causes of visual impairments? ANSW✅✅aging
congenital
disease
accidents
hearing impairment ANSW✅✅general term used to describe all types of hearing loss, rating from
very mild to profound diseases
deafness ANSW✅✅state occurring when a person is unable to understand speech through the
ear alone, either with or without a hearing aid
hard-of-hearing ANSW✅✅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 & post-lingual hearing loss ANSW✅✅pre - losing your hearing before speech develops
post - after you learn how to speak, you lose your hearing
, RH incompatibility (rhesus disease) ANSW✅✅when your rh is incompatible with your fetus, if
you're negative. if you're positive, you have a protein on your red blood cells
conductive ANSW✅✅something stuck in the ear canal (calcification - softening of the middle of
the ear bones - hard to hear)
sensorineural ANSW✅✅aging causes it, most common type of hearing loss
central ANSW✅✅least common type of hearing loss
communication with people with hearing impairments ANSW✅✅lipreading
sing language
technological assistance
intellectual disability/mental retardation ANSW✅✅2.5% of the general population have M.R.,
based on IQ only (about 3-5/1000 births)
legally blind ANSW✅✅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 ANSW✅✅describe a serious loss of vision that cannot be
corrected by medical or surgical procedures or with conventional eyeglasses.
acuity ANSW✅✅the amount of detail an individual can see compared to what a person with
normal vision sees. (measured in the 20/20 method)
visual field ANSW✅✅the entire area that can be seen at one time with the fixed eye. the normal
field of vision is around 170 degrees.
ocular dominance ANSW✅✅the tendency to prefer visual input from one eye to the other
tunnel vision ANSW✅✅you can see straight ahead, and you cannot see the sides
QUESTIONS AND CORRECT
ANSWERS
cataracts ANSW✅✅lens become milky and cloudy and this cloudiness distorts rays of light and
prevents light from being focused on the retina. (symptoms: blurred vision) (causes: lack of oxygen)
glaucoma ANSW✅✅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 (loss of
peripheral vision)
diabetic retinopathy ANSW✅✅diabetes causes changes in blood vessels in the retina that cause
hemorrhaging, one of the most common causes of visual impairments an blindness in the U.S. (spots
floating in the visual field
what are the major causes of visual impairments? ANSW✅✅aging
congenital
disease
accidents
hearing impairment ANSW✅✅general term used to describe all types of hearing loss, rating from
very mild to profound diseases
deafness ANSW✅✅state occurring when a person is unable to understand speech through the
ear alone, either with or without a hearing aid
hard-of-hearing ANSW✅✅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 & post-lingual hearing loss ANSW✅✅pre - losing your hearing before speech develops
post - after you learn how to speak, you lose your hearing
, RH incompatibility (rhesus disease) ANSW✅✅when your rh is incompatible with your fetus, if
you're negative. if you're positive, you have a protein on your red blood cells
conductive ANSW✅✅something stuck in the ear canal (calcification - softening of the middle of
the ear bones - hard to hear)
sensorineural ANSW✅✅aging causes it, most common type of hearing loss
central ANSW✅✅least common type of hearing loss
communication with people with hearing impairments ANSW✅✅lipreading
sing language
technological assistance
intellectual disability/mental retardation ANSW✅✅2.5% of the general population have M.R.,
based on IQ only (about 3-5/1000 births)
legally blind ANSW✅✅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 ANSW✅✅describe a serious loss of vision that cannot be
corrected by medical or surgical procedures or with conventional eyeglasses.
acuity ANSW✅✅the amount of detail an individual can see compared to what a person with
normal vision sees. (measured in the 20/20 method)
visual field ANSW✅✅the entire area that can be seen at one time with the fixed eye. the normal
field of vision is around 170 degrees.
ocular dominance ANSW✅✅the tendency to prefer visual input from one eye to the other
tunnel vision ANSW✅✅you can see straight ahead, and you cannot see the sides
