The National Eye Institute, the practicing physician, and the patient.
D005128:Eye Diseases / Q000517:prevention & control*; D005380:Financing, Government; D006801:Humans; D009316:National Institutes of Health (U.S.); D009885:Ophthalmology; D010036:Otolaryngology; D010414:Pennsylvania; D012106:Research; D012955:Societies, Medical; D014481:United States; D014785:Vision, Ocular