Exam 1 Special Senses: Visual Tests and Experiments

Question 1

? light bending

Answer 1

refraction

Question 2

? ability to focus for close (less than 20 feet) vision

Answer 2

accomodation

Question 3

? normal vision

Answer 3

emmetropia

Question 4

? inability to focus well on close objects (farsightedness)

Answer 4

hyperopia

Question 5

? nearsightedness

Answer 5

myopia

Question 6

? blurred vision due to unequal curvatures of the lens or cornea

Answer 6

astigmatism

Question 7

In farsightedness, the light is focused _____ the retina. The lens required to treat myopia is a _____ lens. The near point of vision increases with age because the _____ of the lens decreases as we get older. A convex lens, like that of the eye, produces an image that is upside down and reversed from left to right. Such an image is called a _____ image.

Answer 7

behind; concave; elasticity; real

Question 8

During distance vision, the ciliary muscle is _____, the ciliary zonule is _____, the convexity of the lens is _____ and light refraction is _____.
During close vision, the ciliary muscle is _____, the ciliary zonule is _____, lens convexity is _____, and light refraction is _____.

Answer 8

relaxed; taut; decreased; decreased

contracted; loose; increased; increased