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.
Help!
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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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