The Ocularist: What to Expect During Your First Visit. On the first visit, the ocularist will measure your child's socket, look at the shape of the socket and match eye color. The conformer that was inserted during surgery is removed and is replaced by a temporary prosthesis. This temporary prosthesis is as close a fit and match as possible to your child's existing eye. The temporary prosthesis is used to help your child get used to wearing a prosthesis.