Typically, a visit for cleaning and re-glazing is recommended every six months. The artificial eye should be replaced every five years. The reasons for replacement can include changes to colour, fit, appearance and comfort, but primarily, it is to prevent socket inflammation and itching due to the degradation of the acrylic plastics. The plastic will “gas out” as it naturally degrades due to environmental exposure and fluid absorption; it releases this gas directly into the socket. Studies at the University of Laval in Quebec have shown that acrylic plastic can maintain its integrity for a five-year period before degradation begins. the Ocularist to assess changes to the socket and make recommendations to maintain optimum appearance and comfort.