Match the characteristics with the appropriate term. There may be more than one

Question

Match the characteristics with the appropriate term. There may be more than one answer, and some answers may be used more than once. A person standing 20 feet away from the Snellen chart can read only the line that should be able to be read by a person with emmetropia at 200 feet. Calculate this person's visual acuity (show your work). What type of vision deficiency docs this person have? A person is given the following prescription for eyeglasses: Does the person have myopia or hyperopia? Which eye has the best uncorrected vision?

Explanation / Answer

1). sensory component of contraction of ciliary muscle = Cranial nerve III

2). Motor component of contraction of ciliary muscle = Cranial nerve III

3). sensory component of regulation of pupil size = Cranial nerve II, Cranial nerve III

4). Motor component of contraction of pupil size =Cranial nerve II, Cranial nerve III

5), Normal vision = Emmetropia, rods, cones

6). optic disc = Blind spot

7). Color vision = Cones

8). Uneven cornea = Astigmatism

9). Vision problem due to older age = Presbyopia, close vision

10). A person considered to be farsighted = Hyperobia, distant vision

2). A person standing 20 feets away from snellen chart can read only that line which a person having emmetropia (normal vision) can read at 200 meters.

a). Visual activity =

height of 20/200 letter on a near acuity chart loacted at veiwing distance from patient's eye is of d = 16 inches = 1.33 foot

.4433 millimeters x 1.33 foot x 10 = 5.89 mm

b). The person has normal vision.

3).A person having OD +1.25 and OS +1.75 has Hyperopia

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