At Sight On - Whom Distance Curvature Of

At sight on - Whom distance curvature of a crystalline lens increases (..2), and The light beams getting in an eye from nearby objects, Are precisely focused on a retina of an eye. Than more close is The considered(examined) object, especially convex becomes - Face. In figures 2-2 the short-sighted eye is represented. It(he), as The rule, has more extended form caused or - intraocular pressure at weakness of fabrics of an eye, or Excessive pressure of external muscles of an eye under same conditions, Or, according to the most widespread theory, accepts Such form ostensibly on "command" of the nature, that, when the person Does(Makes) a lot of visual work close, to not hold all time a muscle in the intense condition for preservation in - long time of the convex form of a crystalline lens. Usually To lengthening of an eyeball in the latter case precedes Condition of a so-called spasm of accommodation (false - Bone), when at a normal form of an eyeball The muscle all time remains strained(intense), irrespective of, where There is a considered(an examined) object - close or in the distance (.