TY - BOOK AU - Keirl, Andrew AU - Christie, Caroline TI - Clinical Optics and Refraction : A Guide for Optometrists, Contact Lens Opticians and Dispensing Opticians SN - 9780750688895 AV - RE 925 .K45 2007 PY - 2007/// CY - Philadelphia PB - Elsevier KW - Eye- Accomodation and refraction KW - Physiological optics KW - Refractive errors KW - Contact lenses KW - Optics KW - Refraction, ocular ER -