[Clinical analysis and epidemiological investigation of proteinoid corneal degeneration].

A series of corneal degeneration similar to Labrador keratopathy occurring in the Mongol nationalities is reported. Epidemiological survey indicated the incidence to be 8.11%, mostly among people over 30 years, and to increase with age. The majority of cases were bilateral and asymptomatic, showing proteinoid guttate opacities in the superficial layers and lower quadrants of the cornea. The etiology was believed to be related to altitude, cold windy and dusty environment, and probably alcohol.