1. Defective vision, and the principles on which it may be corrected by optical means: read by appointment before the Medical Society of Virginia, at the annual session in Staunton, November 20th, 1872 Author(s): Cunningham, F. D. (Francis Deane), 1836-1885, author Publication: [Richmond?] : [publisher not identified], [1873?] Subject(s): Refractive ErrorsEyeglasses
