1. Why is simultaneous movement of the eyes when focusing on an object useful for binocular vision? 2. a) What features of the human eye determine visual acuity? b) Why can a human not see the large E on the Snellen chart at 2000 ft. whereas some other animals can? 3. What are the major processes that occur in the eye when we shift our focus from a far to a near object? 4. Define the following and indicate what effect they have on human vision Cataract Detached Retina Glaucoma Diabetes Mellitus Night Blindness Far Sightedness Near Sightedness 5. What regions of the brain are involved in vision? 6. Define and give physiological and/or anatomical explanations for the results of the following exercises: Blind spot Eye preference Visual acuity Convergence-binocular vision Accommodation Near-point accommodation Astigmatism 7. Field of Vision: What is the anatomical and physiological explanation for the two fields of vision? HINT: Rods and Cones. 1. A very broad field with relatively non-discreet vision vs. 2. A narrow field of acute vision. Hearing Questions 1. What are the auditory receptors, where are they located? 2. Why is hearing impaired when the Eustachian tube is blocked during a head cold? 3. What effect on equilibrium might an inner ear infection have? 4. a. Where is the auditory center of the brain? b. Where is the equilibrium center of the brain? 5. What is Meniere's Disease? 6. What is the explanation for motion sickness? 7. Why does a recording of your voice sound strange to you? 8. What are some everyday activities in which sound localization is important? 9. Give some everyday examples of auditory adaption. 10. Is hearing necessary for equilibrium and balance? Explain? .