Yeah dude...you should wear them when you're playing sports specifically

It never affects you besides the 2 things I told you. Get yourself contacts and a pair of glasses. Wear the contacts 14-16hrs then take them out (don't get the 1 day contacts..get the 30 day ones) put them in the solution and when you get home put on your glasses.
edit: When you put 'em on you don't even notice them. I'm wearing them right now and I can't feel them at all; they're practically weight less and no one else can tell I wear them either.