We Will Consider Work Of An Eye In

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We will consider work of an eye in the light of its doctrine. According to the theory of Gelmgoltsa, the eye adaptation to vision on Herpes Genital various distances occurs by change of curvature of a crystalline lens. Curvature of a crystalline lens varies by influence of a special muscle which is called. Look at drawing 2. The normal eye, as is shown in drawing 2, has the spherical form and in rest is adapted for sight afar. Thus the rays of light going from remote objects, are precisely focused on a retina. At sight at a short distance curvature of a crystalline lens increases (fig. 2) see, and the light beams getting to an eye from nearby objects, are precisely focused on an eye retina. Than more close there is a considered object, especially convex there is a crystalline lens. In drawings 2-2 the short-sighted eye is represented. It, as a rule, has more extended form caused or excessive intraocular pressure at weakness of fabrics of an eye, or excessive pressure of external muscles of an eye under the same conditions, or, according to the most widespread theory, accepts such form ostensibly on nature "command" that when the person does a lot of visual work close, not to hold all time a muscle in a tension for preservation for a long time the convex form of a crystalline lens.