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convex spherical lens |
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convex spherical lens Etymology: L, convehere, to bring together; Gk, sphaira, ball; L, lentil a lens that has sides that curve outward like a section of the exterior of a sphere and that brings light to a focus. It is used in the treatment of hyperopia (farsightedness). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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