surgical movement and fixation of conjunctiva, either bulbar or palpebral, to cover defects in conjunctiva or, more commonly, to cover lacerations or nonhealing, progressive or deep ulcerations of the cornea especially those with desmetoceles. The flaps serve to protect the corneal lesion from eyelid trauma and encourage migration and proliferation of fibroblasts and blood vessels into the area. There are many techniques; some utilize the nictitating membrane.