Which compensatory mechanism would the brain implement in patients diagnosed with strabismus? Duplication of visual stimuli of unaffected eye Blind spots in visual field Macular degeneration Blockage of visual stimuli of affected eye
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Step 1: Strabismus causes misalignment of the eyes, leading the brain to receive two different images. Show more…
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Mr. Gray, a 65-year-old man, was in an automobile accident in which he suffered a concussion. Soon after he was released, he noticed what he described as a "gray spot" in his field of vision. At first, he ignored it, thinking it would go away, but the spot seemed to darken and spread over his visual field. He didn't report any pain with the problem. On calling his physician, he was advised to go to the nearest hospital immediately. A detached retina was diagnosed. After treatment, he regained most of his normal sight back. Five years later, he began having problems again. The central area of his visual field was becoming blurred, and he was losing his depth perception. An initial eye examination revealed neovascularization in both eyes. Question 1: Relate the patient history and circumstances of the injury and the signs and symptoms related to the pathophysiology of this condition. Answers may vary. Question 2: Discuss the treatments available for the patient. Answers may vary. Question 3: Relate the symptoms and signs to those of macular degeneration. Answers may vary. Question 4: Discuss the treatment available and the prognosis for recovering his normal vision. Answers may vary.
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A patient comes in with a tumor of the pituitary gland which has grown upward into the optic chiasm and caused a visual field defect. The most likely defect from compression of the optic chiasm is: (A) complete blindness in one eye. (B) loss of the upper visual fields in both eyes. (C) loss of the nasal visual fields in both eyes. (D) loss of the temporal visual fields in both eyes.
Consider a situation in which someone begins to experience blurred bilateral vision. Using your knowledge of the visual system propose a possible explanation. The explanation can involve any step of the visual pathway. There is no single correct answer.
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