Гиперметропия, or the far-sightedness is such infringement of a refraction when parallel beams from far located subjects because of small length of an eyeball or weak refracting ability of an eye are focused behind a retina. For correction гиперметропии convexo-convex, collecting lenses are used. Теплопроведение (conduction) - heat return at direct contact of a body with other physical objects. To гепатопротекторам preparations (легалон, liv-52, эссенциале concern, etc.), raising stability of a liver to the pathological influences, promoting restoration of its activity ферментативных systems, ингибирующие перекисное oxidation липидов, are vitamins of group R (routines, кварцетин). Hyperpolarizing рецепторный the potential arises on a membrane of an external segment, further extends along a cage to it пресинаптического the terminations and leads to reduction of speed of allocation mediatora-glutamata. That рецепторная the cage could answer the following light signal, is necessary ресинтез родопсина, which occurs in the dark (темновая adaptation) from a vitamin A tsis-isomeasure, therefore at a lack of a vitamin A organism, develops insufficiency of twilight sight ("night blindness").