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4. Describe the roles of the retina and the optic nerve in vision.
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- The eyes of vertebrates and cephalopods are similar in structure and function. A difference between the vertebrate eye and the cephalopod eye is that the vertebrate eye has: a. an iris surrounding the pupil, whereas in cephalopods the pupil surrounds the iris. b. a lens that changes shape when focusing, whereas in cephalopods the lens moves back and forth to focus. c. a retina that moves in the socket when recording the image, whereas in cephalopods the retina changes shape when stimulated. d. a pupil that shrinks in size in bright light, whereas cephalopods have a pupil that enlarges in bright light. e. retinal synthesized from vitamin A, whereas cephalopods lack retinal.1. Describe the role of the lens in vision.6. Discuss visual acuity.
- 2. A 32-year-old man was diagnosed with damage of the central part of the optic chiasm. Draw a diagram of the visual analyzer and indicate its main structures. How will the transmission of information from the retina to the centers of the cerebral cortex change? How will change the field of view?2. Describe the sensory processing, primarily focusing on the visual system. Begin with how your eyes see the object to how it's processed in the brain to understand what and where the object is locating.6. What layer of the eye converts visible light into nerve impulses?
- 2. How does the eye perceive size, depth and relative distances?3. With the aid of a diagram, illustrate how the visual angle is calculated.5. How does the eye normally adjust to looking at objects at different distances..?2. Which of the following statements is a CORRECT description of the structure with its function? Group of answer choices a.Iris functions to refract (bend) light before it reaches the lens b.Sclera functions as a surface for the attachment of extraocular muscles c.The ciliary body functions to secrete vitreous humor d.Lacrimal glands function to produce aqueous humor e.Conjunctiva functions to supply the eye with blood and nutrients