If you really need your regular glasses all the time, these are perfect for you. They go right over your glasses and can be taken off if you go out of the sun. It means that you don't have to buy prescription sunglasses and be switching glasses any time you in or out of a store, or some such thing. These fit over glasses. You can simply slide them off your prescription glasses, put in a pocket or purse, and never have to worry about your eyes adjusting.I recommend them. They are really convenient.