When you loose an eye, it hurts psychologically. Artificial eye completes the face and provides the confidence to overcome the loss.
The eye is made by impression technique with hand painting and gives a close match with the original eye. The impression material is injected in the socket to get the accurate impression from which the mold is made.
The advantages include better movement, very little discharge and a comfortable fit. Semi customization is also available, where in the fit of a ready stock eye is modified for a perfect centration, and some times even colour matching is done. Not as effective as full customization. Ready stock eyes are also available.