If this goes to court this guy is safe because his supplier will show up with their lawyers (and deeper pockets) and point out that their glasses are safe. They will show that Amazon was the party who didn't take care.
Note, there are many different ways to sell on amazon. I'm not clear which route this guy took, only some result in nobody knowing if the glasses amazon ships are safe.
Avoiding quality control on purpose is no excuse. That's a proof that you are not following the law and that can be considered as aggravating circumstances if you avoid it on purpose. That's the sort of thing that a judge may consider as a reason to send you to jail for longer.