focal sign

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• FOCAL-69 — was the landmark version of the FOCAL programming language, more widely publicized than the original version of the language created in 1968. FOCAL 69, created by Richard Merrill is important because: * It was the basis for all later derivatives… …   Wikipedia

• Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

• Neurological sign — A neurological sign is a class of medical signs. Neurological soft signs (NSS) are minor neurological signs indicating non specific cerebral dysfunction. Their presence has been documented in cases of schizophrenia.[1] Focal neurologic signs… …   Wikipedia

• Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …   Wikipedia

• Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …   Wikipedia

• Optical aberration — v · d · e Optical aberration …   Wikipedia

• Magnification — For Magnification in the sense of exaggeration, see Exaggeration. For the 2001 album of progressive rock band Yes, see Magnification (album). The stamp appears larger with the use of a magnifying glass Magnification is the process of enlarging… …   Wikipedia

• nervous system disease — Introduction       any of the diseases or disorders that affect the functioning of the human nervous system (nervous system, human). Everything that humans sense, consider, and effect and all the unlearned reflexes of the body depend on the… …   Universalium

• Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …   Wikipedia

• Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …   Wikipedia

• Headlamp — Headlight redirects here. For other uses, see Headlight (disambiguation). High Beams redirects here. For the urban legend also known by that name, see Killer in the backseat. A motor scooter s front with an impractical number and variety of… …   Wikipedia