Plechaty reported orange is a safe color for lenses. In a medical study, cataract patients reported improvements in color contrast when wearing orange lenses. Assuming the strong light conditions present most of the time in Hawai'i, a good rule of thumb is that the eyes should not be visible when looking into a mirror. Lenses should not affect color vision or traffic signal visibility. Lenses should be impact resistant.
Polycarbonate plastic has the best impact resistance of all materials.
Lenses should absorb at least 99 percent of UVA and UVB rays. Read the label to ensure the percentage. The Honolulu Advertiser, a division of Gannett Co .