One of Hoya Vision Care's Phoenix lenses, made with Trivex lens material from PPG Industries, bounced back from the impact of a 1 kilogram (2.2 pound) steel ball dropped from 50 inches in this drop ball test displayed at the Hoya booth during Vision Expo East 2001. The fragments seen on the floor of the test are from a shattered CR-39 lens, tested in the same manner as the Phoenix lens just moments before this demonstration.