Are there preservatives in saline soltion safe?

As an avid contact wearer, I use saline solution to rinse my contacts daily before each use. Recently, a friend told me that many commercial saline solutions contain preservatives, which could affect the overall health of my eye. Is this something I should be concerned about? The saline I use has always felt comfortable so I never thought it could pose a problem.


Are other drinks besides water still hydrating?

I frequently hear that beverages with caffeine or alcohol are not good for replenishing fluids and preventing dehydration. But in reality aren't they just a bit less effective at hydrating your body than other beverages? In other words, if you were stuck in the desert with nothing to drink but beer, coffee and cola, would you actually be worse off and die of thirst sooner if you drank these beverages versus not drinking anything at all?


Will honey lighten the color of my eyes?

My eyes are light-brown, and when I've been crying or when it's bright outside they look greenish. I want my eyes to be that greenish all the time. I heard that putting honey in your eyes will lighten them. Are there any side effects? Is it bad for my eyes?