Ask your grandfather or grandmother for glasses and see: are the lenses in the glasses collecting or diffusing?

If the lens in the glasses is collecting, then the person suffers from hyperopia. These lenses help the lens to increase its optical power. An image of a closely spaced object appears on the retina.
If the lens in the glasses is diffusing, then the person suffers from myopia. These lenses reduce the optical power of the lens. When viewing distant objects through diffusing lenses, their image appears on 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.