In the article by Dr. Harry Eggers, "Power of Ophthalmic Lenses," in the November issue (12:753, 1934) a wrong line was inserted in the third paragraph under the center head "Distance of Lens from the Eye," on page 760. The fourth line in this paragraph should read: "would act as a minus 14.3 diopter sphere (because C = 0.001 X 3 X."