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A series of young adult patients developed solar retinopathy during sun exposure over a two-day period in a particular region of the United States during March of 1986. Evaluation of the photobiological and geophysical parameters involved in solar retinitis are presented. A multifactorial pathogenesis is proposed. Of interest, a possible increase in terrestrial ultra-violet B radiation secondary to a localized relatively low ozone column during the days involved may have contributed to the retinal damage. Recommendations for protection from solar retinitis are noted.