13. Pitts DG, Chou BR. Chapter 24, Prescription of Absorptive Lenses. In Borish’s Clinical Refraction,. Benjamin WJ, ed. Philadelphia: W.B. Saunders, 1998.

13. Pitts DG, Chou BR. Chapter 24, Prescription of Absorptive Lenses. In Borish’s Clinical Refraction,. Benjamin WJ, ed. Philadelphia: W.B. Saunders, 1998.