The main functions of the optical system of the eye:
1. The necessary degree of refraction of the rays;
2. Focusing images and objects strictly in the plane of the retina;
3. Creating the necessary length of the axis of view.
As a result, a person can perceive objects in volume, clearly and in color, that is, signals about the realism of the image come to the brain structures. At the same time, the eye is able to perceive in dark and light, as well as color indicators, that is, it has the function of light perception and color perception
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.