I need to let you know that there was a change in Serengeti Progressive Prescription lenses. Glass lenses are no longer available in a progressive form. However, it is still available in a single vision form. Until June 1st there are no progressive lenses available from Serengeti Prescription sunglasses collection.
After June 1st they will start making Trivex lenses (called Polar PHD)Â inÂ a progressive prescription form. The cost should be about the same for the new lens material. Trivex lenses will still come with the same Serengeti lens technology, but now it will be lighter and should be able to take higher prescriptions.