If you get headaches when you wear some sunglasses,you may want to consider Polarized lenses,as headaches are often an indication that you are sensitive to glare.Believe it or not,sunglasses really only take the edge off the sun (and look cute,of course),they don't cut out glare unless they are polarized.If you start getting headaches with your new sunglasses,you should probably have an eye exam,and if they find that you do not need vision correction,you can still have Plano (non-rx) Polarized lenses made (if you do need correction,they can make RX sun lenses).Just a little tip from your friendly neighborhood Optician.