The sudden occurrence of unilateral and bilateral blindness, as reported in the literature from the personal experiences of numerous qualified investigators, occurring in humans and producing such catastrophic effects seems to mandate experimental effort to try and answer three basic questions: (1) Can an animal model be found which will demonstrate similar retinopathy for study? (2) If such a model is found, what mechanisms are involved in the production of the retinal pathologic changes? (3) What are the characteristics of the drug or drug combinations necessary to produce these pathologic changes?
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