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Photochromic medical filter eyeglass lenses with low, medium or high blue light filter cutoffs; lemon yellow (450 nanometers); yellow amber ( 511 nanometers); orange amber (527 nanometers); red amber (550 nanometers); dark brown extra dark (550 nanometers). Photochromic: lenses adjust to changes in light levels. Lenses improve contrast, comfort, adaptation time to changing light levels for light sensitive people. Eliminate virtually all blue light and ultraviolet radiation. Plano or prescription power; in patient's frame, manufacturer's side shield frame or clip on frame.
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