High index lenses, in the optical industry, are generally 1.64 index or higher. Lenses are less costly compared to 1.74. 1.67 lenses are thinner and lighter than polycarbonate and CR-39. They reduce eye distortion caused by strong prescriptions.
Water Repellent With Hydrophobic Surface
Over 99% Transmittance Of Visible Light Reduce The Eyestrain
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