There are two lenses that are FDA approved for continuous wear for up to 30 days – Focus Night and Day by Ciba Vision and Pure Vision by Bausch & Lomb.
The downside of extended wear contacts is that if you live or work in a dusty or smoky environment, tiny particles will get into your eyes, so the lenses won’t feel comfortable for several days.
Silicon-hydrogel contacts
Discomfort and dry eyes are constant complaints among contact lens wearers. Contact lens manufacturers worked very hard on developing lenses that don’t dry your eyes, even by the end of the day. The result of this research is silicon hydrogel contact lenses. You can wear them from the early morning till midnight and they feel comfortable all day long.
