What visual defects are you aware of? What are such defects as hyperopia and myopia?

Farsightedness and myopia. In a myopic person, a parallel beam of light entering the eye reaches a point in front of the retina, and in a farsighted person – behind the retina.

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.