Yeah, of course you can. I often do it because I am a girl who is nearsighted also wearing eyelashes. Of course, if you want to use the eyelashes with contacts lenses, you should be much more careful than usual. For example, you should know that you should finish the contacts lenses before making eyelashes extension. If not, you are easily to make the lenses dirty while putting on the contacts lenses. Besides, if you follow my advice, you can also make the eyelashes extension better with the vision help from the contacts. Of course, when you finish a day, you should put off both of them, additionally, you should make sure that what should you do first, contacts first or eyelashes first, as for me, I often choose the contacts first. Here and now I want to tell you that you must clear up the left behind from the eyelashes extension, or your eyes will get infected. Above suggestion really works, and pls no worries.