Originally Posted by harrychiling

That's a great question, the daily lenses don't have any surface treatments applied to them, which means that they will build deposits (gunk, proteins, lipids, etc.) on the lens. They are basically processed less because they are meant to be thrown out at the end of the day. Other lenses 2 week and monthly have been treated to provide better deposit resistance or are made of materials that provide better deposit resistance than dailies. Depending on the person on their wear I have seen patients that wear a two week lens monthly and have next to no deposits on the lens and I have also seen patients that wear those same two week lenses and have deposits the first day or two. . .