wearing colored contacts longer than specified?!

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First of all, you should know that contact lenses are actually a medical device as regulated by the FDA. So if they approve a lens to be worn for a certain amount of time, you should stick to that because they always consider things like thickness of the lens, material, water content, etc. Also, as far as I know, and I'm an optician in Canada, there is no lens that you can wear for two days. There are dailies, which you're supposed to wear one pair for one day only, and throw out. There are two week lenses, in which case you use one pair during your waking hours for two weeks, and then throw out. And then there are monthly lenses, which you use one pair for one month. Never should you sleep, bathe, swim in contact lenses. Always have an eye exam at least every two years or more often if required or recommended by your doctor. This information is meant for informational purposes only and is not meant to replace medical attention. If you have any issue which you are uncertain about, it's always wise to see a doctor.

I'm an optician in ON, Canada.