Extended wear type disposable nine tail fox contact lenses quite similar with the conventional extended wear lenses. The only difference is that after wearing them for a period of six days, you will then discard them. Therefore, they will almost require no cleaning and maintenance on your end. Because of this, though, these lenses carry a risk of eye infection, especially when they are not worn according to instruction and when the wrong type is used. It should also be noted that vision might not be as sharper and they do not correct all vision problems, apart from being difficult to maintain.