Human Biology: Concepts and Current Issues
Human Biology: Concepts and Current Issues
7th Edition
ISBN: 9780321821652
Author: Michael D. Johnson
Publisher: Benjamin Cummings
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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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If someone is born with dense cataracts on both eyes, and the cataracts are removed years later, what happens?A. The person remains permanently blind.B. The person gradually recovers all aspects of vision.C. The person gains some vision, but remains impaired on object recognition, motion vision, and depth perception.D. The person gains almost all aspects of vision, but remains greatly impaired on color perception.
What is the X-shaped structure that sits just below the brain’s ventral surface and represents the merging of the optic nerves from the two eyes? A) lens B) optic chiasm C) fovea D) iris
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.
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Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license