Corning Ophthalmic's SunSensors family just got a little bigger, with the addition of its new High Performance Photochromic Coating. SunSensors HPC blocks 100 percent of UVA and UVB rays, and can be used on a wide range of materials, such as polycarbonate, 1.60 index and 1.67 index plastic lenses. The company says that the HPC lenses are among the fastest in darkening and fading.