Divergence of the Eyes Relative

The divergence of the eye can be defined as the angle between a straight line drawn through the pupil of the eye to the main point of the retina and the central axes of the optical system of the eye. Since the cornea and lens no longer have their own separate central axis, under normal conditions the angle is slightly less than its true value. In everyday life, angle deviations in the most extreme case do not exceed 3-5 degrees. Consequently, the concepts of eye divergence in various literary sources are designated in their own words: visual or physical. Angular, linear, horizontal angle. The angle between the assumed straight line and the visual axis of the eye (when using a visor). The linear distance between the centers of two closely spaced objects, visible to the eye without aids. Horizontal linear distance measured in relation to the eyebrows.

Thus, **divergence of the eye** is the angle between the visual point of the eye, i.e. the area of ​​vision associated with the exit site of the optic nerve and the center of the optical system (fontanel) on the cornea. Thus, the calculations are based on the geometry of a triangle, where the horn of the conical segment acts as the hypotenuse. And its length must be known with an accuracy of 0.1 mm. The average length of the cornea of ​​an adult is about 23 mm.

**The norm is considered to be an angle of no more than 60