ABO Practice Test Questions and Answers 2023 With Complete Solution

To mount a lens in a nylon suspension type frame, it would be necessary to _______ the lens. a) Drill b) Notch c) Groove d) V-Bevel - CORRECT ANS c) Groove The optical center of a lens is: a) At the geometrical center b) One the 180 line c) At the point where the "a" and "b" measurement meet d) A lens location of zero deviation of the optical axis - CORRECT ANS d) A lens location of zero deviation of the optical axis The progressive power lens has a progressive zone after where power: a) Gradually increases b) Of the cylindrical increases c) Stays the same d) Abruptly changes - CORRECT ANS a) Gradually increases Standard transmissions in sunlenses should range between a) 10% and 30% b) 15% and 30% c) 10% and 25% d) 15% and 25% - CORRECT ANS b) 15% and 30% OC placement verification is important to ensure: a) Accuracy of patient pd b) Correct power of the add c) That there is no unwanted prismatic effect d) None of the above - CORRECT ANS c) That there is no unwanted prismatic effect Materials that best produce polarized light by reflectance are called: a) Diatomic b) Diametric c) Dielectric d) Diabolical - CORRECT ANS c) Dielectric Coating lenses by depositing a metallic film such as magnesium floride on the surface of a finished lens is done for the following reason: a) Reducing light transmitted b) Reducing reflections c) Reducing weight d) Reducing power - CORRECT ANS b) Reducing reflections Aspheric lens surfaces are most commonly used with