UV Exposure to the eyes causes vision loss and cancer
UV exposure causes eye diseases (cataracts and AMD), blindnes, eye cancer
Vision loss from AMD
Vision loss from cataracts
ESPF 10 Blocks UV rays from the front of the lens only. Reflected rays are not blocked.
Lenses that boast 100% UV protection are only ESPF 10. They block UV rays from the front of the lens. The do not block reflected UV rays.
ESPF 25 blocks UV rays from the front of the lens and also blocks reflected rays
See the ESPF 25 Lens Selection
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.
How does E-SPF work?
The higher the E-SPF, the better the UV protection
The Eye-Sun Protection Factor is inspired by the protection index displayed prominently on daily moisturizers, sunscreens and sun-protective clothing, and used to rate effectiveness against ultraviolet radiations : the higher the E-SPF value, the greater the level of UV protection.
Wearing a lens with an E-SPF value of 25 means that your eye is 25 better protected that without any lens. (The E-SPF excludes direct eye exposure from around the lenses*)
E-SPF 25 means your eye is 25 times better protected than without any lens.
All lenses are not equal in terms of UV protection
UV protection is not linked to the color of your lenses. In fact, some transparent lenses can protect you even better than some sun lenses**. Whatever its tint, a lens’ protection is a result of a combination of a material and a coating, which varies from one lens to another. As a result, not all lenses are equal in terms of UV protection.
Make sure you get the right protection for your eyes
With the Eye-Sun Protection Factor, you can now compare the levels of UV protection provided by all kinds of eyewear, including clear, photochromic, and sun lenses (tinted or polarized). Ask your Eye-Care Professional for advice.
Up to 25 for corrective clear lenses
Up to 50+ for sun lenses
Based on measurements made up until now***, the E-SPF values vary from 2 to a maximum of 25 for daily eyeglass lenses and up to 50+ for sun lenses.