HUMAN BIOLOGY: CONCEPTS - 9780134312729
HUMAN BIOLOGY: CONCEPTS - 9780134312729
8th Edition
ISBN: 2819260095972
Author: Johnson
Publisher: PERUSALL
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Chapter 12, Problem 8TY
Summary Introduction

Introduction:

Proper focusing and directing of the visual stimulus is crucial when it comes to ensuring the eye functions optimally. However, it is important to understand exactly what components of the eye play a crucial role in this focusing process.

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Because fibers of the optic nerve that originate in the nasal halves of each retina cross over at the optic  chiasma, each lateral geniculate receives input from a.both the right and left sides of the visual field of both eyes. b.the ipsilateral visual field of both eyes. c.the contralateral visual field of both eyes. d.the ipsilateral field of one eye and the contralateral field of the other eye.
When reading, a person with astigmatism sees some lines in sharp focus while others appear blurred. Astigmatism is caused by the Select one: a. inability of the iris to contract or dilate b. lens becoming cloudy and rigid c. number of cones on some parts of the retina being deficient O d. curvature of the cornea or lens not being symmetrical
a.) Which of the following components of the eye is responsible for two-thirds of the focusing?    a. The lens   b. The aqueous humour   c. The retina   d. The cornea   e. The fovea b.) Which of the following components of the eye allows a person to focus on objects at various distances?   a. The vitreous humour   b. The optic nerve   c. The lens   d. The photoreceptor cells.   e. The sclera c.) Which of the following components of the eye is responsible for image resolution?  a. The pupil  b. The retina  c. The sclera  d. The lens  e. The cornea
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Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license