FRANK C. TODD, M.D. Prof. Ophth. and Oto-Laryng., Univ. Minn.; Chairman Sec. Ophth. A.M.A. and second Vice-Pres. A.M.A.; Ophth. Surg. Univ. and Hill Crest Hospital. ALBERT EUGENE BULSON, JR., B.S., M.D. Prof. Ophth. Ind. School Med.; Ex-Ch. Sec. Ophth. A.M.A.; Ophth. Surg. St. Joseph's Hospital; Editor Jour. Ind, Slate Med. Assn. DEDICATED TO DR. EDWARD JACKSON DR. JOHN E. WEEKS DR. GEORGE EDMUND DE SCHWEINITZ LIEUTENANT COLONEL ROBERT HENRY ELLIOT HONORARY MEMBERS BY THE CHICAGO OPHTHALMOLOGICAL SOCIETY IN RECOGNITION OF THEIR SPLENDID ACHIEVEMENTS IN THE DOMAIN OF OPHTHALMOLOGY ABSTRACTS. I. Etiology and Classification of Glaucoma. Abstract:-- Etiologic factors include: obstruction of lymph spaces, especially the angle of the anterior chamber; blood pressure, arterial, capillary and venous; affinity of tissues for fluids; alterations of the intra-ocular fluids; inflammations in the eye ball; and failure of a nerve apparatus to control fluid in the globe. Classification: various types of glaucoma constituting clinical entities must be recognised, as: simple glaucoma, recurring exacerbations, congestive, mechanical, and increased tension arising during uveal inflammations. DR. EDWARD JACKSON, Denver. Discussion by DR. FRANCIS LANE, Chicago. II. Pathology of Glaucoma. Abstract:-- (a) Changes taking place in corneal tissue. (b) Iris angle with particular reference to the ligamentum pectinatum. (c) Variations in the condition of the ciliary body. (d) Consideration of the anatomical changes that take place in glaucoma secondary to retinal and chorioidal hemorrhage. DR. JOHN E. WEEKS, New York City. Discussion by DR. E. V. L. BROWN, Chicago. III. Concerning Non-surgical Measures for the Reduction of Increased Intra-ocular Tension. Abstract:-- (a) The use of myotics; their preparation, method of administration, and explanation of their action. (b) Reduction of increased intra-ocular tension by means of various mechanical measures, notably massage, vibration massage, suction massage, electricity and diathermy. (c) Indirect reduction of increased intra-ocular tension, brought about by lowering the general vascular pressure. (d) The relation of osmosis, lymphagogue activity, the absorption of edema, the stimulation of capillary contractility, and the lowering of the affinity of ocular colloids for water in their relation to the reduction of increased intra-ocular tension. DR. GEORGE EDMUND DE SCHWEINITZ, Philadelphia. Discussion by DR. NELSON M. BLACK, Milwaukee. IV. Trephining for Glaucoma. Abstract:-- (a) The aim of the operation is the formation of a foreign-body-free fistula. (b) It is most important to leave uveal tissue untouched. (c) Method of doing this explained. (d) The area available for trephining. (e) Method of increasing that area. (f) Cornea splitting. (g) Placing of trephine. (h) Technique of using trephine. (i) The operation is not difficult.