RST 230 Exam 3 / Questions & Expertly Verified Answers, 2025 / 2026.Quiz____?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 Quiz____?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 Quiz____?acuity - Answer✓✓ described amount of detail an individual sees compared to a normal eye Quiz____?visual field - Answer✓✓ Page 1 of 28 1 / 3
includes entire area that can be seen at one time with the fixed eye -Normal vision is 170 degrees roughly Quiz____?tunnel vision - Answer✓✓ can see straight ahead but not to the sides Quiz____?peripheral vision - Answer✓✓ cannot see straight ahead, can only see peripheral Quiz____?tunnel vision - Answer✓✓ cannot see to the sides only straight ahead Quiz____?ocular dominance - Answer✓✓ the tendency to prefer visual input from one eye to the other Quiz____?Page 2 of 28 2 / 3
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 Quiz____?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 Quiz____?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 Page 3 of 28
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