Cautions on Contact lenses/Scotchgard on Crizal lenses

I'm trying to wear my glasses more, but get this, most recently when I got my new glasses, I broke out in hives. MAN FERTILITY and I couldn't figure it out, until I noticed the little cleaning cloth they gave me said, CRIZAL LENSES, NOW WITH SCOTCHGARD!!! Blech. I have sensitivities to Scotchgard, which sounds wiggy. Embarrassed, I brought the glasses back to the store where the optometrist actually was really nice about it--he said "some people cannot 'tolerate' these lenses."

When are they going to stop putting chemicals in everything??

Anyway, I had been feeling like wearing contacts a lot is not so natural. Turns out there are some possible hazards of contacts: From Natural News:
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(NaturalNews) Those that wear contact lenses should be aware of important information that can help protect the eyes from permanent damage. There is mounting evidence that contact wearers should give their eyes some time away from contacts. The conventional wisdom is that people can wear contact lenses for 12-14 hours per 24 hour period but that once a week the eyes should have a rest from contact lenses. Experts agree that if contacts are worn for over 16 hours a day every day that eyes may become starved of oxygen. This means that over the long term the cornea could lose its transparency.

If the eyes do not get enough oxygen, tiny blood vessels in the eyes will start to become more apparent and new ones will develop. One of the concerning aspects about these blood vessels growing on the eye is that there typically will not be any outward symptoms of this occurring. It is a good idea to have your eyes examined regularly while wearing contacts so that if this occurs it can be monitored.

read more here.