If a child who is blind from birth undergoes an operation to restore vision, then at first it will be difficult for him to determine the size and shape of objects. Why?
Determining the shape and size of an object, the distance to it, this is not only direct visual perception, but also an analysis of what was seen on the basis of previous life experience. This is done by the neurons of the occipital lobe of the cortex, therefore, if the child was not sighted, the neurons of this zone never performed a similar function, and it must take time before they adapt to this process.
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.