There are many things you can do but the best one from my point of view is to maintain a healthy diet, carrots are not just a myth and although they do not make you see in the dark they are very beneficial to the health of the optic nerve and eyes themselves.
Another thing ive seen is something called an eye bath, it is basically a little cup which fits around your eye socket, you fill this with the solution that comes with it and bathe each eye for a few minutes. I found it great for aleviating tired and dry eyes and it also leaves an extra protective layer of fluid on your cornea which lasts for a while, i recommend carrots and eye baths.
Edit: Was my information helpfull?
