dark-adapted eye
101Skyglow — (or sky glow), is a kind of light pollution, visible by the glowing effect seen in the skies over many cities and towns as a dome of light. Light domes can also appear above over illuminated rural shopping centers, stadia, and the like. Skyglow… …
102Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H …
103Limiting magnitude — is an astronomical term which describes the faintest apparent magnitude detectable or detected by a given instrument.In some cases, limiting magnitude refers to the utter threshold of detection. In more formal uses, limiting magnitude is… …
104Lasers and aviation safety — Under certain conditions, laser light or other bright lights (spotlights, searchlights) directed at aircraft can be a hazard. The most likely scenario is when a bright visible laser light causes distraction or temporary flash blindness to a pilot …
105rod — rodless, adj. rodlike, adj. /rod/, n., v., rodded, rodding. n. 1. a stick, wand, staff, or the like, of wood, metal, or other material. 2. a straight, slender shoot or stem of any woody plant, whether still growing or cut from the plant. 3. See… …
106Absolute threshold — In neuroscience and psychophysics, an absolute threshold is the smallest detectable level of a stimulus. For example, in an experiment on sound detention, researchers may present a sound with varying levels of volume. The smallest level that a… …
107Audience scanning — An audience watches a laser light show during the SIB trade fair in Rimini, Italy in 2002. Audience scanning (sometimes called crowd scanning ) occurs when a laser beam is directed toward the people observing a laser show or display. Although… …
108Rod — /rod/, n. a male given name, form of Roderick or Rodney. * * * (as used in expressions) Carew Rod eccentric and rod mechanism hot rod * * * ▪ measurement old English measure of distance equal to 16.5 feet (5.029 metres), with variations… …
109flick phosphene — Also known as eye movement phosphene. The term flick phosphene was introduced in or shortly before 1957 by the American ophthalmologist Bernard R. Nebel, who had observed the concomitant phenomenon in himself. The term is used to denote a type …
110Flash blindness — is visual impairment during and following exposure to a light flash of extremely high intensity. [ [http://www.hf.faa.gov/docs/508/docs/cami/0107.pdf Laser Pointers:Their Potential Affects on Vision and Aviation Safety (April 2001)FAA] ] It may… …
