Inexpensive clip-on gadgets found on Amazon often feel a little gimmicky, but well built devices can have real functionality ...

In the words of one reviewer, it "takes up zero visual space on the wall and fits all kinds of sunglasses (even clip-on ...

Clip-On sunglasses: A practical and affordable choice, clip-on sunglasses attach magnetically to your existing prescription glasses. However, they may not fit all frames and can be a bit cumbersome.