So I bought three of these glasses for my old mum thinking that it could solve some of her vision problems.
First of all, the site were I ordered them did not indicate that they would be shipped from another country. We live in Sweden and the glasses was shipped from the Netherlands, if I recall correctly. This means that there was an added customs fee that I did not expect in the total cost.
But what really gets me going is that on arrival all three pair of glasses was broken. The adjustment screw on the right hand side had busted threads and did not work at all. Furthermore, what I could see thru the left lens indicated that the focus on these so called glasses was not really "focused". And nowhere could I find a position on these adjustable lenses that allowed me to se anything thru the glasses. It did, however, manage to spawn a beginning headake as I was looking thru them for about 3-4 minutes trying to find a focus point that would eventually work. That never happened.
This product is made out of plastic. And if the lences gets separated with less than half a millimeter between them, the focus is completly gone. Think of the lens that will be closest to your left eye and the one that will be closest to our book on the same eye. If there is the sligtest gap in between them, the focus is gone. And that is an other great issue. The low quallity of the product. The lenses are no way as exact as they need to be to function and the frame does not have the rigidity it needs to be able to keep the lenses in focus.
So, all I can say is: Save your time and money and buy desent glasses. There are no short cuts to quallity.