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  2. Cataract - Wikipedia

    en.wikipedia.org/wiki/Cataract

    Frequency. 60 million (2015) [ 6 ] A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. [ 1 ][ 7 ] Cataracts often develop slowly and can affect one or both eyes. [ 1 ] Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing ...

  3. Ray J - Wikipedia

    en.wikipedia.org/wiki/Ray_J

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 September 2024. American singer (born 1981) Ray J Norwood in 2011 Born William Ray Norwood Jr. (1981-01-17) January 17, 1981 (age 43) McComb, Mississippi, U.S. Occupations Singer songwriter rapper television presenter actor entrepreneur Years active 1989–present Works Discography filmography ...

  4. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...

  5. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    This is an accepted version of this page This is the latest accepted revision, reviewed on 10 October 2024. There is 1 pending revision awaiting review. Portable Document Format, a digital file format For other uses, see PDF (disambiguation). Portable Document Format Adobe PDF icon Filename extension.pdf Internet media type application/pdf, application/x-pdf application/x-bzpdf application/x ...

  6. Phosphene - Wikipedia

    en.wikipedia.org/wiki/Phosphene

    A phosphene is the phenomenon of seeing light without light entering the eye. The word phosphene comes from the Greek words phos (light) and phainein (to show). Phosphenes that are induced by movement or sound may be associated with optic neuritis. [1][2] Phosphenes can be induced by mechanical, electrical, or magnetic stimulation of the retina ...

  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. List of dragons in mythology and folklore - Wikipedia

    en.wikipedia.org/wiki/List_of_dragons_in...

    Bhogavati, "peopled by snakes" in Hindi, is the residence of the Nāga King Varuṇa. Pakhangba: A Manipuri dragon, a giant serpent that relates to humans. Vritra: Vritra, also known as "Ahi", is a serpent or dragon and is a major asura in Vedic religion. He is the personification of drought, and adversary of Indra the thunder god and king of ...

  9. Hearing - Wikipedia

    en.wikipedia.org/wiki/Hearing

    Hearing. Video showing how sounds make their way from the source to the brain. Hearing, or auditory perception, is the ability to perceive sounds through an organ, such as an ear, by detecting vibrations as periodic changes in the pressure of a surrounding medium. [1] The academic field concerned with hearing is auditory science.