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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  3. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    A mosaic can have two different colored eyes if the DNA difference happens to be in an eye-color gene. There are many other possible reasons for having two different-colored eyes. For example, the film actor Lee Van Cleef was born with one blue eye and one green eye, a trait that reportedly was common in his family, suggesting that it was a ...

  4. Ommatidium - Wikipedia

    en.wikipedia.org/wiki/Ommatidium

    The butterfly compound eye consists of multiple ommatidia, each of which consist of nine photoreceptor cells (numbered from R1–R9), and primary and secondary pigment cells. [5] Nymphalid butterflies have the simplest eye ommatidium structure, consisting of eight photoreceptor cells (R1–R8) and a tiny R9 cell organized into a different tier.

  5. External morphology of Lepidoptera - Wikipedia

    en.wikipedia.org/wiki/External_morphology_of...

    The shape and dimensions of the proboscis have evolved to give different species a wider and, therefore, more advantageous diet. [3] There is an allometric scaling relationship between body mass of Lepidoptera and length of proboscis [ 22 ] from which an interesting adaptive departure is the unusually long-tongued sphinx moth Xanthopan morganii ...

  6. Comparison of butterflies and moths - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_butterflies...

    Despite appearances, butterflies and moths have different types of compound eyes. Though not universal, moths very commonly have superposition eyes, while butterflies equally commonly favour apposition eyes. This is due to the superposition eye's adaptations for low light environments suiting the nocturnal moths, and the apposition eye's ...

  7. Compound eye - Wikipedia

    en.wikipedia.org/wiki/Compound_eye

    Compound eye of a house centipede Compound eye of a dragonfly. A compound eye is a visual organ found in arthropods such as insects and crustaceans.It may consist of thousands of ommatidia, [1] which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color.

  8. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    An example of the Landolt C eye chart (also known as the Japanese eye chart.). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]

  9. Lepidoptera - Wikipedia

    en.wikipedia.org/wiki/Lepidoptera

    Lepidoptera (/ ˌ l ɛ p ɪ ˈ d ɒ p t ər ə / LEP-ih-DOP-tər-ə) or lepidopterans is an order of winged insects which includes butterflies and moths.About 180,000 species of the Lepidoptera have been described, representing 10% of the total described species of living organisms, [1] [2] making it the second largest insect order (behind Coleoptera) with 126 families [3] and 46 superfamilies ...

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