Main Planes of the Optical System of the Eye

The planes of the optical system of the eye are planes perpendicular to the axis of the eye, which are characterized by the fact that in the front main plane, when the object is positioned at a distance from the eye, a direct image of the same size as the object is obtained. This occurs because light rays passing through the front principal plane are refracted at an angle that corresponds to the angle of incidence.

The anterior principal plane is the plane that is approximately 18 mm from the pupil. It is characterized by the fact that light entering the eye through the pupil hits the retina. The posterior principal plane is located approximately 40 mm from the pupil and is characterized by the fact that the image of an object in front of the eye is formed on the retina.

There are also other planes in the optical system of the eye that are also important. For example, the image plane and the focal plane. However, the main planes of the optical system of the eye are the anterior and posterior principal planes.

The most important planes of an optical optical system, the points of their intersection, at which some optical properties are summed up and others cancel out, make it possible to reduce the process of image formation to a set of transitions from one plane to another. Thus, the system of two completely independent eyes has turned into a single functional organ that serves to form an image