My opthalmolgist told me that as long as all I needed was readers, to get the $6 ones from Target/Wally/etc. and not worry about the high dollar frames/lenses until my eyes got past the point of those working.  He of course still wants to check my eyes regularly to make sure there aren't issues, but as far as glasses themselves, he's a fan of the cheapies.  My kinda guy!! :)