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  2. Martin–Schultz scale - Wikipedia

    en.wikipedia.org/wiki/Martin–Schultz_scale

    The scale consists of 20 colors [1] (from light blue to dark brown-black) that correspond to the different eye colors observed in nature due to the amount of melanin in the iris (in this case, the lower the number, the lighter the eye color): [2] [3] 1-2: blue iris (1a, 1b, 1c, 2a : light blue iris - 2b: darker blue iris) 3: blue-gray iris

  3. Martin scale - Wikipedia

    en.wikipedia.org/wiki/Martin_scale

    The original Martin scale, summarized below, consists of 16 colors (from light blue to dark brown-black) that correspond to the different eye colors observed in nature due to the amount of melanin in the iris. The numbering is reversed in order to match the Martin–Schultz scale, which is still used in biological anthropology. In this case ...

  4. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    A light blue iris with limbal ring Blue iris. There is no intrinsically blue pigmentation either in the iris or in the vitreous body. Rather, blue eyes result from structural color in combination with certain concentrations of non-blue pigments. The iris pigment epithelium is brownish black due to the presence of melanin. [54]

  5. Tyndall effect - Wikipedia

    en.wikipedia.org/wiki/Tyndall_effect

    A blue iris with some melanin. The color of blue eyes is due to the Tyndall scattering of light by a translucent layer of turbid media in the iris containing numerous small particles of about 0.6 micrometers in diameter. These particles are finely suspended within the fibrovascular structure of the stroma or front layer of the iris. [9]

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  7. Iris versicolor - Wikipedia

    en.wikipedia.org/wiki/Iris_versicolor

    Iris versicolor or Iris versicolour is also commonly known as the blue flag, harlequin blueflag, larger blue flag, northern blue flag, [2] and poison flag, plus other variations of these names, [3] [4] and in Great Britain and Ireland as purple iris. [5] It is a species of Iris native to North America, in the Eastern United States and Eastern ...

  8. Tesla sales dropped 1.1% in 2024, its first annual decline in ...

    www.aol.com/tesla-reports-1-1-sales-142358684.html

    Tesla’s global vehicle sales rose 2.3% in the final quarter of 2024 thanks to 0% financing, free charging and low-priced leases. Tesla sales dropped 1.1% in 2024, its first annual decline in a ...

  9. Stroma of iris - Wikipedia

    en.wikipedia.org/wiki/Stroma_of_iris

    Blue eyes and the eyes of albinos, however, lack pigment. Structure of the iris and surrounding parts showing the stroma of iris ( stroma iridis ). The stroma connects to a sphincter muscle ( sphincter pupillae ), which contracts the pupil in a circular motion, and a set of dilator muscles ( dilator pupillae ) which pull the iris radially to ...