plane lens

plane lens
plano lens a lens with no curve and no refracting power; light rays enter and leave parallel.

Medical dictionary. 2011.

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  • lens — I. noun Etymology: New Latin lent , lens, from Latin, lentil; from its shape Date: 1673 1. a. a piece of transparent material (as glass) that has two opposite regular surfaces either both curved or one curved and the other plane and that is used… …   New Collegiate Dictionary

  • lens — [[t]lɛnz[/t]] n. pl. lens•es 1) opt a piece of transparent substance, usu. glass, having two opposite surfaces either both curved or one curved and one plane, used in optical devices for changing the convergence of light rays, as for… …   From formal English to slang

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