RST 230 Exam 3 / Comprehensive Update Actual
Questions & Answers (A+ Guide Solution)
Terms in this set (84)
legally blind 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 describe a serious loss of vision that cannot be corrected
sighted, or low vision by medical or surgical procedures or with conventional
eyeglasses
acuity described amount of detail an individual sees compared to a
normal eye
visual field includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
tunnel vision can see straight ahead but not to the sides
peripheral vision cannot see straight ahead, can only see peripheral
tunnel vision cannot see to the sides only straight ahead
ocular dominance the tendency to prefer visual input from one eye to the
other
Used to test dominant eye; triangle with hand, close one
the miles test
eye, the eye that doesn't move is the dominant eye
,cataracts -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 -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 -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
-Trauma to the eye
-Aging
major causes of visual
-Congenital
impairments
-Disease
-Accidents
, sighted guide technique -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 general term used to describe all types of hearing loss,
ranging from very mild to profound deafness.
deafness state occurring when a person is unable to understand
speech through the ear alone, either with or without a
hearing aid.
hard of hearing 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 you lose your hearing before speech develops
post lingual you lose your hearing after you have learned how to speak
Rh incompatibiltiy When a woman is negative and a man is positive and they
produce a positive baby → protein on your red blood cells??
Confused
-Outer ear or middle ear
-The most common cause of conductive hearing loss is
blocked ear canals Ex. Ear wax, barbie shoes
conductive hearing loss
-Second cause = punctured ear canals
-Otosclerosis → softening and calcification of the three
middle ear bones
Questions & Answers (A+ Guide Solution)
Terms in this set (84)
legally blind 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 describe a serious loss of vision that cannot be corrected
sighted, or low vision by medical or surgical procedures or with conventional
eyeglasses
acuity described amount of detail an individual sees compared to a
normal eye
visual field includes entire area that can be seen at one time with the
fixed eye
-Normal vision is 170 degrees roughly
tunnel vision can see straight ahead but not to the sides
peripheral vision cannot see straight ahead, can only see peripheral
tunnel vision cannot see to the sides only straight ahead
ocular dominance the tendency to prefer visual input from one eye to the
other
Used to test dominant eye; triangle with hand, close one
the miles test
eye, the eye that doesn't move is the dominant eye
,cataracts -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 -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 -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
-Trauma to the eye
-Aging
major causes of visual
-Congenital
impairments
-Disease
-Accidents
, sighted guide technique -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 general term used to describe all types of hearing loss,
ranging from very mild to profound deafness.
deafness state occurring when a person is unable to understand
speech through the ear alone, either with or without a
hearing aid.
hard of hearing 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 you lose your hearing before speech develops
post lingual you lose your hearing after you have learned how to speak
Rh incompatibiltiy When a woman is negative and a man is positive and they
produce a positive baby → protein on your red blood cells??
Confused
-Outer ear or middle ear
-The most common cause of conductive hearing loss is
blocked ear canals Ex. Ear wax, barbie shoes
conductive hearing loss
-Second cause = punctured ear canals
-Otosclerosis → softening and calcification of the three
middle ear bones
