There are several common synonyms for the term "artificial eye", all of which refer to a prosthetic device designed to replace the natural eye. These include "ocular prosthesis", "glass eye", "false eye", and "prosthetic eye". These devices are typically made of a combination of acrylic and silicone materials, and are custom-fitted to each individual patient to provide a natural-looking appearance. While artificial eyes cannot completely replace the functionality of a natural eye, they can restore a person's appearance and improve their quality of life. Patients who have lost an eye due to injury or disease may choose to wear an artificial eye for cosmetic and psychological reasons.