imo, best thing to do for red eyes is go in the bathroom and wash your face, eye drops just seem to make the red eye worse, and it's not just me that feels that way either... i learned to start (when i had to hide it that is) washing my face when i was going to have to be around smoeone i didn't want to know... not only does it seem to help with the red eyes (it's not immediate, but you will notice a definate diffrence 10 or so mins afterwards) but it kinda 'wakes' you up some, makes you not look so stoned (squinty eyes, ect ect.)