The lenses of these items were incredibly susceptible to scratches, more so than any other reading glasses I've ever purchased.  If you are not ready to guard them with your life, and store and carry them in the most delicate of holders, do not bother to purchase these auto-scratch blinders. Not only are the lenses the softest of plastic, but other parts (side bars) break off easily, too.  These items are not &#34;rugged&#34;, nor strong enough.