Certified Paraoptometric Assistant and Technician Study Guide

A colmascope is used to verify that a glass lens has been _______________ CORRECT ANSWER-heat-tempered When verifying lens optical quality, the primary defect to search for is a localized area of _________________ CORRECT ANSWER-poor optics Which of the following cylinder powers would be acceptable, according to the American National Standards Institute (ANSI) standards, for a lens with a prescription of +3.00, -1.75 x 100? CORRECT ANSWER-a. -2.00 b. -1.89 C. -1.87 :) d. -1.50 What is the cylinder axis tolerance for a lens with a cylinder power of -1.00 D? CORRECT ANSWER-+/- 3 degrees There can be no more than ___________ prism diopters of unwanted horizontal prism in a lens. CORRECT ANSWER-2/3 There can be no more than __________ prism diopters of unwanted vertical prism in a lens CORRECT ANSWER-1/3 The vertical segment location tolerance for a mounted lens is within __________________mm of specification. CORRECT ANSWER-1