E-SPFEye Sun Protection Factor (rating)
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"Go for regular eye exams to check the health of your eyes and talk to your optician about the spectacle lens E-SPF index," says Andy.
In creating it, the company's R&D team based its work on the international standard for the measurement of UV protection for eyes, the Eye-Sun Protection Factor, or E-SPF. Neva Max UV offers a minimum E-SPF of 25 on all lens materials, except 1.5 clear.
With an E-SPF of 25 (for all materials except Orma), Crizal UV lenses are said to be the only ones to reach the best level of protection in the clear lens category.