Before revision: To measure visual acuity, in 1835 German ophthalmologist, Heinrich Küchler, made the first eye chart consisting of pictures of objects or alphabetic letters of decreasing size that patients were to identify.
After revision: To measure visual acuity, in 1835 German ophthalmologist, Heinrich Küchler, made the first eye chart consisting of pictures of objects of decreasing size that patients were to identify.