description Essilor Crizal Prevencia Overview
Essilor Crizal Prevencia lenses utilize a specialized coating to reduce the amount of blue light emitted from digital screens, potentially minimizing eye strain and disruption of sleep patterns for extended periods of use.
help Essilor Crizal Prevencia FAQ
What does Essilor Crizal Prevencia actually filter?
Crizal Prevencia is an anti-reflective lens coating designed to selectively reduce some blue-violet light while letting beneficial blue-turquoise light pass. It is not the same as a dark blue-blocking lens that heavily tints everything amber.
Why do Crizal Prevencia lenses sometimes show a purple reflection?
The purple or violet reflection comes from the coating's selective reflection of certain blue-violet wavelengths. It is a visible sign of the coating, not a defect in the prescription.
Is Crizal Prevencia only for computer glasses?
No. It can be used on everyday prescription lenses, including glasses worn indoors and outdoors, depending on the lens design your optician orders.
How is Crizal Prevencia different from regular Crizal anti-reflective coatings?
Regular Crizal coatings focus mainly on reducing reflections, smudges, scratches, and glare. Prevencia adds selective blue-violet light filtering as a specific feature.
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