Aha! I also wear contact lenses and I believe that they are primarily responsible for the dragon-like crimson my eyes become after smoking, or even being around any smoke of any material.:rasta:

I don't believe smoking pot or using Visine will do lasting damage to your eyes, but I do know that Visine sucks. However, ClearEyes for me make my eyes so clear and white, it actually looks weird. Better than red, though, and my eyes feel much better too!