The eye exam itself isn't too expensive IMO. Around $60 at VisionWorks and Walmart. Make sure they write your pupilary distance on the prescription. They try and weasel out of this so you have to ask for it. Take that to zenni.com and look at the clearance frames. They take about a week to get to you but are a lifesaver for low income ppl. You can even try on glasses at Walmart or wherever you go to get an idea of style before you order online.