| PCc | periscopic concave |
|---|---|
| PCx | periscopic convex |
| periscopic | Viewing all around, or on all sides. <optics> Periscopic spectacles, spectacles having concavo-convex or convexo-concave lenses with a considerable curvature corresponding to that of the eye, to increase the distinctness of objects viewed obliquely. Origin: Cf. F. Periscopique. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| periscopic lens | A lens with 1.25 D base curve. (05 Mar 2000) |
| periscopic meniscus | A lens designed to correct spherical aberration and coma (q.v.). Synonym: periscopic meniscus. (05 Mar 2000) |
| periscopic |
affording a wide range of vision; said of microscopical and meniscus lenses.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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|---|---|
| periscopic concave l. |
convexoconcave l.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| periscopic convex l. |
concavoconvex l.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| periscopic l. |
one with a 1.25D base curve.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| periscopic s. |
ones with either menisci or concavoconvex lenses, with the concave surfaces toward the eyes, allowing the eyes extra latitude of motion.
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