This is the second edition of the book intended for the optician and optometrist rather than for the opthalmologist. The chapter on anatomic data is elementary, as is that on biochemistry and physiology. Chapter III discusses conditions for which contact glasses are prescribed. The author includes retinitis pigmentosa in which he says that contact lenses are a means of prolonging useful vision. He cites 2 cases, both of highly myopic persons. The only proper conclusion he can draw is that his 2 (14 and 20 Δ) myopic patients, who had retinitis pigmentosa, saw better with contact glasses. He discusses optics and fitting and devotes a chapter to solutions used with contact lenses. The final one hundred and sixteen pages are devoted to patents for contact glasses.