Neurotech Pharmaceuticals, Inc. announced that the Company's product candidate, NT-501, demonstrated a strong biologic effect in two Phase 2 clinical trials for retinitis pigmentosa (RP). RP is a slowly developing condition that causes the progressive degeneration of rod & cone photoreceptor cells in the retina that over time diminishes night and peripheral vision and eventually leads to blindness. RP is an orphan-designated indication for which there are currently no approved treatments.