Useful english dictionary. 2012.
Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… … Wikipedia
Refractive error — Refraction error Classification and external resources ICD 10 H52.0 H52.4 ICD 9 … Wikipedia
refractive ametropia — ametropia due to fault in the dioptric system of the eye … Medical dictionary
refracting system — noun : refractive system … Useful english dictionary
Catadioptric system — A 150 mm aperture catadioptric telescope (Maksutov) A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric… … Wikipedia
Automated Refraction System — An automated refraction system is a group of ophthalmic devices used during an eye examination to aid in the determination of a person s refractive error and prescription for glasses or contact lenses. The standard components of an automated… … Wikipedia
University of Michigan Health System — Infobox University name = University of Michigan Health System motto = Excellence and Leadership in Patient Care, Research and Education established = 1850 (U M Medical School) 1869 (University Hospital) 1997 (U M Health System) type = Public… … Wikipedia
Space Detection and Tracking System — Das Space Detection and Tracking System (SPADATS)[1] (deutsch: Weltraumortungs und Objektverfolgungssystem)[2]) ist ein System innerhalb der Luftverteidigung der USA. SPADATS bildet ein weltweites Netzwerk mit optischen und elektronischen… … Deutsch Wikipedia
Ocular immune system — Human eye. Ocular immune system protects the eye from infection and regulates healing processes following injuries. The interior of the eye lacks lymph vessels but is highly vascularized, and many immune cells reside in the uvea, including mostly … Wikipedia
Diffraction-limited system — Memorial to Ernst Karl Abbe, who approximated the diffraction limit of a microscope as , where d is the resolvable feature size, λ is the wavelength of light, n is the index of refraction of the medium being imaged in, and θ (depicted as α in the … Wikipedia
