Brianne N. Hobbs, OD January 06, 2014 Treatment With 9-cis Beta-Carotene-Rich Powder in Patients With Retinitis Pigmentosa: A Randomized Crossover Trial Rotenstreich Y, Belkin M, Sadetzki S, et al. JAMA Ophthalmol. 2013;131:985-992. Study Summary Retinitis pigmentosa is a devastating diagnosis. This condition can leave optometrists and ophthalmologists scrambling as they attempt to explain possible treatment […]