What is E-SPF?
Definition of the E-SPF
The Eye-Sun Protection Factor (E-SPF) is a new international index certifying the overall UV protection provided by a lens. It is an objective rating system developed by Essilor International which can rate any lens for daily eyewear as well as for sunglasses.
Inspired by the cosmetic industry standard of UV protection, the E-SPF rating system follows a simple pattern: The higher the E-SPF, the better the UV protection. Thanks to this reference UV index, it is now possible for everyone to choose easily the best UV protection for their eyes and the sensitive skin around them.
Developed by Essilor Research & Development, the Eye-Sun Protection Factor follows an impartial measurement protocol, which has been endorsed by an independent third party.
The E-SPF provides a simple yet effective way to grade the total UV protection offered by a lens.