Dysphotopsia (D) are unwanted light reflexes from an optical lens. Can arise from glasses or contacts but usually spoke of from IOLs. Less common now than previous because of better IOL design. More common with premium multifocal IOLS like ReStor, ReZoom, Crystalens experience with the new Symphony is not yet known. Can occur monofocal. Person sees arcs, rays, ghosting, flaring, starbursts, etc. Postive is seeing light colored area usually in outer periphery negative is seeing black colored area. It is not rare but neither is it common. Usually goes away without treatment. Samuel Masket MD of Los Angeles is leading US expert.