People who suffer from blindness actually have senses such as taste, feel and smell that become increased to help one function resulting from blindness. These senses become strengthened as to compensate for the lack of vision or inability of the eye or eyes to see. Eye health and how to obtain it should be of utmost importance as eyes are not as replaceable like teeth are.

Eye drops that revitalize the optic nerve and retina which include vitamin A,B2,C,D3, beta carotene, niacin, lutein and lycopene should be taken or used. Cinnamon is also a good herb for eye health. Even if you take a vitamin packet or herbs and create a vapor of sorts for the eyes to absorb such nutrients as this may strengthen the eye nerves and repair the retina.

Is it humanly possible to give sight to a human eye by surgery within the damaged eye?

IDEA:

If electrodes were placed into the eye surrounding the optic nerve, along with the placement of a coated contac lens designed to omit tiny impulses to the electrode, that would cause the brain to respond to signals from the retina; which would work like this:  light - contac lens - cornea - lens - refracted light - retina - brain
 (the contac lens would omit impulses, acting as a messenger to the electrodes.)
 (the retina is now able to transmit signals to the brain and with the electrodes the brain can process signals it
  receives from it.)

To preserve the health of natural body and part should be the goal of everyone with regard to staying healthy. Any use of body part or function provided artificially has its limitations.