Our eyes are sensitive to many things. Smoke is foreign, and just irritates them. If your eyes feel sore, dry, and watery, then that's normal. I don't smoke, but when I go camping if campfire smoke enters my eyes they get irritated and hurt. read more
But smoke from cigarette will damage the delicate eye blood vessels and makes them itchy and look bloodshot. The smoke is toxic and can threaten any part of your body including your eyes. Age related macular degeneration, cataracts and optic neuropathy are usually the side effects of smoking on eyes. read more
I do not want to hear "because it's smoke", i'd like to know the reason behind it, in as much depth as possible. Thank you. read more