Dr Grossman also read a paper on the treatment of conical cornea by the hot-air cautery. He pointed out that any form of red-hot substance had the disadvantage of causing necrosis of any tissue it touched, and in addition it was difficult to accurately regulate the temperature. This could be more satisfactorily obtained by superheated air.
Reference: The treatment of conical cornea by the hot-air cautery. Arch Ophthalmol. 1906:64.
A look at the past . . .. Arch Ophthalmol. 2005;123(12):1762. doi:10.1001/archopht.123.12.1762-b