Worthless
I purchased this visor to clip onto prescription glasses that I wear while driving. My glass frames are of a modern design using a sturdy synthetic material. It is impossible to clip this visor onto the frame. I tried clipping this same visor onto a older pair of metal wire framed glasses. The visor retaining clips where barely able to grasp the frame. The slightest shake and the visor came loose and fell off. The clips on this visor are very short in length and the degree that they spread open to grasp and hold on to  modern frames is poor. Also, this product ships from overseas and it took several weeks for it to arrive. Although it is inexpensive, it is a complete waste of money. I recommend not to purchase this product and look elsewhere.
Rating: 1 stars