>>8747591 lb
Get some Vit D by just going out into the sunlight for a little bit. Close your eyes, look up at the sun and soak in the Vit D you are needing through your eye lids - that's how we absorb it!
I do it everyday and it helps my eyes! Especially, because I'm farsighted and reading a screen all day long doesn't help.
Also - I always increase the font size to 133%, makes it a lot easier to read!!
I would not recommend eye drops, just use a wet clean wash cloth over your eyes, the coolness helps a lot.