|Presbyopia is a
progressive condition typically requiring individuals
over the age of 40 to use reading glasses. The natural
lens inside the eye gradually loses its flexibility and
its ability to focus on near objects.
When light passes through the cornea and lens
of the eye, it strikes the retina which relays the image
through the optic nerve to the brain. However, this
condition will be changed when ageing process involves.
The age-related changes take place in the muscle fibers
surrounding the lens and also within the proteins in
the lens, making the lens harder and less elastic. Therefore,
the eye has increasing difficulty focusing up close.