Good news/bad news scenario.  The lenses in these glasses (I have two pair now, one plastic and one metal framed) are very good.  Just a small step below the more expensive prescription version I also have.  However, I already returned one set of these glasses as the ear piece on one pair was falling off &#34;out of the box&#34;.  I can see why other reviewers have concerns about the reliability of the frames.  Both plastic and metal versions have similar ear piece mechanisms. I will be extra careful as they are prone to failure.  Placing these lenses in a quality frame would be an excellent value and one I would rate higher.