1) with the help of sight, a person can determine the color, shape, size of objects, illumination and distance;
2) there are receptors in the retina – rods and cones that distinguish color and light; a person has binocular vision, which makes it possible to determine the size of an object, the distance to it; accommodation (change in the curvature of the lens) allows you to consider objects at different distances.
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.