Lectures on the operative surgery of the eye : or, an historical and critical inquiry into the methods recommended for the cure of cataract, for the formation of an artificial pupil, &c. &c. &c. Containing a new method of operating for cataract by extraction. Being the substance of that part of the author's course of lectures on the principles and practice of surgery which relates to the operations on that organ / By G. J. Guthrie.