How to make the sclera white again?

somehow i have abused my eyes,having not slept on time. etc. and now it has small red veins. does drinking lots and lots of water help it appear pure again,like when we were babies, and it also turns red so quickly and very obviously when im stressed.and even the color of the turns from white to slightly greenish,maybe its exaggeration buts thats how i see it.my clmate once said that it somehow looked like excrement.does visine really make the eye clear superficially?