Great if you have a Nickel allergy
I had a pair of glasses that were causing a rash and I complained to my optometrist that I thought there might be nickel in the frame, he knew I was allergic. This test kit confirmed it and my frames now are only titanium. Interestingly, the place where the nickel was located was on the bridge that holds the plastic nosepiece, and that's where I had a reaction. The rest of the frames were nickel free.
Rating: 5 stars