A scleral shell is a special form of an ocular prosthesis made of glass. It is used to cover a blinded eye that cannot or should not be removed by enucleation.
As the scleral shell is very thin, it can be worn like a contact lens over the blinded eye, enabling a normal appearance in everyday life.
Because blinded eyes are still sensitive to touch, a certain habituation period is required before the scleral shell can be worn all day. They should normally be taken out at night to relieve the eyeball.