
Vernon D. is a member of VSP's Provider Services team.
A physics professor at the University of Oxford may have found a unique avenue to help those who don’t have access to eyeglasses in developing countries. Joshua Silver has developed frames with the unique ability to adjust to variable strengths, on-the-fly. One frame with the potential to serve millions without a visit to an optometrist?
Here’s a quick rundown on how those glasses work:
The secret of the self-refractive glasses is their lenses. They consist of clear membranes filled with silicon oil, protected by plastic discs. The wearer can adjust the amount of oil in the lenses using a dial fitted to a syringe on the arms of the glasses.


