Focus dailies, Acuvue 1 Day Moist, etc and all of those daily disposable contact lenses are made to wear throughout the day and then throw away at night. If you are a patient sleeping in them that is like SARAN WRAP ON YOUR EYES. I am being honest. I am an optometric assistant and have seen many patients who have not listened and have blisters on the inside of the eyelids to more worse conditions like neovascularization where the daily lens is over worn and the eye is lacking oxygen flow to the cornea SO artificial blood vessels grow into the iris. I'm telling you I've seen it and even expereinced it years ago just because I didnt have proper knowledge. Also with the neovascularization due to lack of oxygen from not wearing the correct lenses for sleeping (like Ciba Night and Day) your vision worsens and you could become blind if the artificial blood vessels reach your pupil. K! So DO NOT SLEEP IN DAILIES they are called DAILIES for a reason!!