Pure Optics was written for new and experienced opticians needing a complete resource for their trade. Pure Optics by Phernell Walker, ABOM will also prepare an individual for the ABO Certification Exam. Topics include anatomy, frame fitting, lens designs, prism, and much much more. Phernell Walker is a Master Optician and has a Masters in Business Administration. He is an accomplished public speaker and has dedicated his career in teaching and training opticians, ophthalmic technicians, optometrists, and ophthalmologists in the art of opticianry and ophthalmic care. Pure Optics has been a valuable resource for over a thousand ophthalmic professionals in the U.S.