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A conformer is a clear acrylic shell fitted after an 
enucleation of the eye
Enucleation is the removal of the eye that leaves the eye muscles and remaining orbital contents intact. This type of ocular surgery is indicated for a number of ocular tumors, in eyes that have sustained severe trauma, and in eyes that are oth ...
if the final artificial eye is not available at the time of surgery, to hold the shape of the eye socket and allow the eyelids to blink over the shell without rubbing the suture line.
The conformer shell holds the shape ready for the artificial eye, and is worn for six to eight weeks after surgery.
Some ocularists will make a temporary artificial eye which can be worn as the conformer shell.
References
{{Eye procedures Eye surgery