What distinguishes predators from herbivorous, the victims from hunters, of course, this peripheral sight. The usual direct sight gives a chance to make out production in the smallest details while peripheral sight provides information on the dangers trapping from other parties.
What the person is able to see, without directing a direct look regarding, that surrounding space which we realize not accurately, however, are quite capable to read, and it is accepted to call peripheral sight.
Its viewing angle, as a rule, does not exceed 180 degrees across and 130 degrees down. The similar property of a human eye is explained by special characteristics of its physical building, it also helps us to be guided well in surrounding space, to coordinate the movements and movements.
Strong concentration of photosensitive cages in the main, central part of a retina and reduction it explains features of our color perception on each side: the usual, central sight helps us to catch and perceive a world around variety of colors while the peripheral sight is less sensitive and capable to distinguish perfectly only bright, contrast colors.
The division of functional duties which developed since ancient times between men and women played a fundamental role in development of peripheral sight in women and men. The male which is a caste of hunters is capable to obtain most accurately information on the object which is in a zone of the central sight. While the women forced to carry out a lot of cases and at the same time to watch a surrounding situation and games of children, can brag of the first-class peripheral sight and an opportunity to catch and perceive a huge number of fine details at the same time. However with age both that and others are equally inclined to loss of sharpness of notorious peripheral sight.
The huge value for such professions as the pilot or even the athlete for which assessment of a surrounding situation has sometimes the vital value has this appearance of sight. Even such skill as fast reading books, is gained due to development of peripheral sight for this reason there is the whole set of exercises developed for strengthening of this natural property of an eye all of them are connected with focusing of attention on the central and surrounding its objects.