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  2. Transparency and translucency - Wikipedia

    en.wikipedia.org/wiki/Transparency_and_translucency

    Moving from longer (0.7 μm) to shorter (0.4 μm) wavelengths: Red, orange, yellow, green, and blue (ROYGB) can all be identified by our senses in the appearance of color by the selective absorption of specific light wave frequencies (or wavelengths). Mechanisms of selective light wave absorption include:

  3. Glass coloring and color marking - Wikipedia

    en.wikipedia.org/wiki/Glass_coloring_and_color...

    Glass coloring and color marking may be obtained in several ways. by the addition of coloring ions , [ 1 ] [ 2 ] by precipitation of nanometer-sized colloids (so-called striking glasses [ 1 ] such as "gold ruby" [ 3 ] or red "selenium ruby"), [ 2 ] Ancient Roman enamelled glass , 1st century, Treasure of Begram

  4. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    In the US market, soft contact lenses are approved by the US Food and Drug Administration. [2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them. [3] These include: soft contact lenses; rigid gas-permeable (RGP ...

  5. Prussian blue - Wikipedia

    en.wikipedia.org/wiki/Antwerp_blue

    Prussian blue pigment is significant since it was the first stable and relatively lightfast blue pigment to be widely used since the loss of knowledge regarding the synthesis of Egyptian blue. European painters had previously used a number of pigments such as indigo dye , smalt , and Tyrian purple , and the extremely expensive ultramarine made ...

  6. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Some colored contact lenses completely cover the iris, thus dramatically changing eye color. Other colored contact lenses merely tint the iris, highlighting its natural color. A new trend in Japan, South Korea and China is the circle contact lens, which extend the appearance of the iris onto the sclera by having a dark tinted area all around ...

  7. Why Were Jeffrey Dahmer’s Eyes Yellow? Explaining His ... - AOL

    www.aol.com/why-were-jeffrey-dahmer-eyes...

    Monster: The Jeffrey Dahmer Story stars Evan Peter as notorious serial killer Jeffrey Dahmer, known for wearing yellow contacts and aviator glasses. Here's why.

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