Abo Exam Pre-Test

UVC {Ans: Which of the following has the shortest and therefore most harmful wavelength? A. UVC B. UVB C. UVA D. INFRARED}None of the Above {Ans: Which of the following RX lenses should never be put in a Z87 Frame? A. 2mm dress lenses B. 3mm non-trademarked lenses C. 3mm tinted/non-trademarked as special purpose lenses D. None of the Above}1.523 {Ans: The index of refraction of spectacle crown glass is A. 1.49 B. 1.523 C. 1.53 D. 1.59}Green Glass lens {Ans: The best absorber of infrared radiation is a A. Polycarbonate lens B. Green Glass lens C. CR-39 lens D. Grey 3 Plastic lens}1.00 Diapter base down {Ans: The patient is looking 10 mm below the distance optical center. What is the prismatic effect to the patient from the distance RX at that level? A. 1.00 diapter base up B. 1.00 diapter base down C. 2.00 diapter base up D. 2.00 diapter base down}Thicker nasally {Ans: A minus lens decentered "out" will result in a finished lens which is A. Balanced B. Thicker temporally C. Thicker nasally D. Uniform in edge thickness}