LABORATORY MANUAL FOR HUMAN ANATOMY & PH
4th Edition
ISBN: 9781260254426
Author: Martin
Publisher: MCG
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Chapter 36, Problem 1CT
Explain why small objects e not lost from our vision under normal visual circumstances.
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Explain why a person with normal binocular vision isable to judge distance and depth of close objects moreaccurately than a person who has lost one eye.
Here you see an astigmatism illustration. Please explain why astigmatisms cause blurred vision in the context of our sense of sight. Please do not merely say “The light rays do not hit the focal point”. Please explain why that matters for the sense of sight.
In a condition called presbyopia, the eyes’ lenses lose muchof their elasticity and maintain a flat shape. How wouldyou expect this condition to affect a person’s vision?
Chapter 36 Solutions
LABORATORY MANUAL FOR HUMAN ANATOMY & PH
Ch. 36 - As a person ages, the elasticity of the lens a....Ch. 36 - Visual acuity is measured using a a. metric ruler....Ch. 36 - Color blindness is a characteristic in of males a....Ch. 36 - The blind spot is located at the of the eye. a....Ch. 36 - Astigmatism results from a defect in the a....Ch. 36 - Only males can inherit the color blindness...Ch. 36 - Nearsightedness is also called myopia. a. True...Ch. 36 - A convex lens can be used to correct hyperopia. a....Ch. 36 - Explain why small objects e not lost from our...Ch. 36 - Complete the following a. What is meant by 20/70...
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- What is meant by the statement Vision happens mainly in the brain?arrow_forwardWatch this video (http://openstaxcollege.org/l/pupillary) to learn about the pupillary reflexes. The pupillary light reflex involves sensory input through the optic nerve and motor response through the oculomotor nerve to the ciliary ganglion, which projects to the circular fibers of the iris. As shown in this short animation, pupils will constrict to limit the amount of light falling on the retina under bright lighting conditions. What constitutes the afferent and efferent branches of the competing reflex (dilation)?arrow_forwardE A H C J D 'K Match the labelled eye structure with the correct eye condition or eye function. Contains the photoreceptors (rods and cones) Glaucoma results if this fluid is not drained properly Sensory neurons to the brain : Captures stray light and contains nourishing blood vessels Contains a high concentration of cones Cataracts can develop in this structure Refracts (bends) light rays into the eye The blind spot: no photoreceptors are located here Protects and supports the eyeball Supports the eyeball with the gel-like fluid The opening for light to enter the inner eyearrow_forward
- The cone photoreceptors are used for O color; fovea centralis O black and white; fovea centralis black and white; sclera layer O color; sclera layer vision and are found in the part of the eye.arrow_forwardexplain how the optical system of the eye creates animage on the retina;arrow_forwardPresbyopia is a condition in which a person's ability to adjust to changes in visual acuity diminishes or disappears entirely. Will she still require reading glasses after LASIK to correct her far vision? Explain.arrow_forward
- Presbyopia is a condition in which a person loses part or all of their capacity to adapt to changes in visual acuity. Will she still need reading glasses after having LASIK to fix her far vision? Explain.arrow_forwardStarting with the optic nerve, trace the action potential from the right temporal visual field to the visual cortex. What is the possible effect of lesions of the visual pathway?arrow_forwardIn order to see a dim star at night, it is better not to look directly at it. If you see it from the “corner of your eye” and then turn to look at it, it may disappear. Explain how this occurs. Also, you can staredirectly at an object in daylight and continue seeing it, despite the bleaching of photoreceptors. Explain how this is possible.arrow_forward
- describe the differences between normal, nearsighted, andfarsighted eyes and explain how defective focusing can becorrected by artificial lenses?arrow_forwardIf the distance between your eye's lens and retina is too short, you will have difficulty seeing objects that are colourful nearby far away movingarrow_forwardDescribe the visual pathway from left visual fields to perception in the brain.arrow_forward
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Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license