The thin layer of opacity involving Bowman’s membrane and adjacent tissue may be secondary to serious disease and degenerative changes in other parts of the eyeball. This is the more common form. It should not be subjected to operation. In a few cases at rather advanced age such a film is seen in eyes otherwise healthy. This primary form of band keratitis is suitable for operation, removal of the film, which restores useful vision. Cases are reported in one of which operation as described was resorted to with excellent result. Read before the American Academy of Ophthalmology and Oto-Laryngology, September, 1926.