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Q&A Chapter 3 Lens Form & Analysis

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
The shorter the radius the _______ the curve and the stronger the diopter power is.   show
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show flatter  
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The smaller the sphere the _______ the curve.   show
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A lens that is both concave and convex is known as a ________ lens   show
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show minus  
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A convex lens is known as a ____ lens   show
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What is another name for a bi-concave lens?   show
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Distortions inherent in any lens with power are known as...   show
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What optical tool is used to measure the curvature of a lens and is considered one of the most useful but underrated tools in the optical industry.   show
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show 1.53  
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show True  
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True or False: The Lens Clock can determine what the lens material is made out of.   show
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What is the "standard" index of refraction in the optical industry?   show
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The cylinder is used for the correction of ___________ and can be used by itself or it can be combined with a sphere.   show
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show Vertex Distance  
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A +10.00 lens has moved away from a patient's eyes by 5mm. What is the power of the lens for the patient now?   show
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A -10.00 lens has been moved closer to a patient's eyes by 5mm. What is the power of the lens for the patient now?   show
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show +9.50  
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show -9.50  
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What does RVD stand for?   show
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show Fitted Vertex Distance  
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show True  
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True or False: A distometer can measure lens thickness.   show
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show +/- 7.00  
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What is the Base Curve for the power ranges of Plano to +2.00   show
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show +4.00  
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show +10.00  
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show minus concave  
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A smaller sphere will have ____ power.   show
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show less  
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show smaller  
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An increase in plus power in the base curve makes objects appear ______ than before.   show
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show flatter  
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