Seeing blue with viagra

[Fenomenon]

I tried viagra for my first time today and started seeing blue? Is that normal? Not dark blue but a blurry light blue about 30 minutes after I took the pills? I got an incredible hard on but did not fell comfortable seeing blue? Can I go blind from this?

[gaffman]

Well I have read recently that yes there is a small probability that you can go blind from taking to much Viagra but the same thing happens to me when I take Viagra. I see blue, light blue to be exact. It goes away after about 20 minutes though.