spherocylinder
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spherocylinder — SYN: spherocylindrical lens. * * * sphe·ro·cyl·in·der (sfēr o silґin dər) a combined spherical and cylindrical lens … Medical dictionary
Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil … Medical dictionary
Distance of closest approach of ellipses and ellipsoids — The distance of closest approach of two objects is the distance between their centers when they are externally tangent. The objects may be geometric shapes or physical particles with well defined boundaries. The distance of closest approach is… … Wikipedia
