What are the identifying markings of nikon eyeglass lenses?

I purchased what i was told to be nikon seemax progressive eyeglass lenses with see coat max coating for 940$ (lenses only). However the store didnot indicate on my receipt what exactly i paid for and when i asked for the certificate of authenticity from nikon i was told that people normally donot ask for this and so that they threw this document away. I'm not particularly happy with these lenses - they are rather thick, yellowish and smudge (dirty) very easily. I'm looking for some halmark on the thenses that can pove they are the latest product available by nikon and i don't know what to look for.

This forum deals in camera lenses, not eyeglass lenses. Our lenses come with Nikon markings and serial numbers that can be checked. My opinion: if you dealt with a reputable dealer and the product cost the recommended retail price, you got an authentic product.

Most probably none. The only way to be sure is to buy them from a reputable store or dealer. With eyewear, the best place to get them is from an optical clinic after consultation with a certified optometrist.