As we get older our bodies age, from our skin and joints to organs and muscles, but our eyes age too. When we are young the lenses within the eyes, called the natural crystalline lens, is clear and flexible, and can focus freely from near to far. People of all ages may need the use of glasses to help them see distance or closer, but when we are younger this is usually due to the shape of the eye.
from Health and Fitness:Eyes Vision Articles from EzineArticles.com https://ift.tt/2FEvBzW