Contacts are regulated like drugs, so, yeah. But there is no such restriction on eyeglasses (in the U.S.). Depending on the state, they do "expire" (in FL it's 5 years), but you can still use it[0]. I have bought some beaters from Zenni and made the Rx up myself (I used to work in a lab a hundred years ago, so I can figure out how much more plus my readers need).
[0] Some places will reject it just because they don't want to deal with your complaints about a new pair not working. Other places will read what's on your current pair and match that. It really depends on who is making the glasses.
