After doing a home eye test to approximate the prescription needed I went through two or three different glasses before finding these. Besides being the right strength these were most comfortable. I was worried about buying cheap glasses on Amazon. My only complaint with these is the arms are very flexible, which is good and bad, if I wear them on top of my head sometimes they fall off. This occurred one time while plowing my driveway. But to my surprise in the spring when I found the lenses they only had very minor scratches. If I hold them up the scratches are not even noticeable in my vision. I would give these glasses a Great rating for both comfort and durability.Update - because I put these on top of my hat (don’t need when on the phone browsing or youtubing) they fall off my head and to the floor. Many many time amd no scratches!!!