Overview Randomized Trial of Vitamin A and Vitamin E Supplementation for Retinitis Pigmentosa Status: Completed Trial end date: 1987-06-01 Target enrollment: Participant gender: Summary To determine whether supplements of vitamin A or vitamin E alone or in combination affect the course of retinitis pigmentosa. Phase: Phase 3 Details Lead Sponsor: National Eye Institute (NEI)Treatments: alpha-TocopherolRetinol palmitateTocopherolsTocotrienolsVitamin AVitamin EVitamins