gundersen flap gundersen flap a gundersen flap, also known as gundersen's flap, gundersen's conjunctival flap, or conjunctivoplasty, and often misspelled gunderson, is a surgical procedure for correcting corneal disease. it involves excising a damaged section of cornea, and replacing it with a section (or "flap") of the patient's own conjunctiva. gundersen flapspecialtyophthalmology it is named for trygve gundersen (1902 – february 24, 1987), an american ophthalmologist of scandinavian descent, who first described the procedure in 1958 at the massachusetts eye and ear infirmary.