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  2. Cataract surgery - Wikipedia

    en.wikipedia.org/wiki/Cataract_surgery

    Cataract surgery, also called lens replacement surgery, is the removal of the natural lens of the eye that has developed a cataract, an opaque or cloudy area. [1] The eye's natural lens is usually replaced with an artificial intraocular lens (IOL) implant.

  3. Johann Wolfgang von Goethe - Wikipedia

    en.wikipedia.org/wiki/Johann_Wolfgang_von_Goethe

    In 1816, Schopenhauer went on to develop his own theory in On Vision and Colours based on the observations supplied in Goethe's book. After being translated into English by Charles Eastlake in 1840, his theory became widely adopted by the art world, most notably J. M. W. Turner. [79]

  4. Down syndrome - Wikipedia

    en.wikipedia.org/wiki/Down_syndrome

    Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...

  5. Prism (Katy Perry album) - Wikipedia

    en.wikipedia.org/wiki/Prism_(Katy_Perry_album)

    Prism is the fourth studio album by American singer Katy Perry. It was released by Capitol Records on October 18, 2013. While the album was initially planned to be "darker" than her previous material, Prism ultimately became a prominently dance-inspired record. Perry worked with several past collaborators, while enlisting new producers and ...

  6. Liquid-crystal display - Wikipedia

    en.wikipedia.org/wiki/Liquid-crystal_display

    A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly [1] but instead use a backlight or reflector to produce images in color or monochrome.

  7. Bell Labs - Wikipedia

    en.wikipedia.org/wiki/Bell_Labs

    Bell Labs [a] is an American industrial research and development (R&D) company credited with the development of radio astronomy, the transistor, the laser, the photovoltaic cell, the charge-coupled device (CCD), information theory, the Unix operating system, and the programming languages B, C, C++, S, SNOBOL, AWK, AMPL, and others.

  8. List of inventors - Wikipedia

    en.wikipedia.org/wiki/List_of_inventors

    Mikhail Lomonosov (1711–1765), Russia – night vision telescope, off-axis reflecting telescope, coaxial rotor, re-invented smalt; Yury Lomonosov (1876–1952), Russia/UK – first successful mainline diesel locomotive; Aleksandr Loran (1849 – after 1911), Russia – fire fighting foam, foam extinguisher

  9. Applications of artificial intelligence - Wikipedia

    en.wikipedia.org/wiki/Applications_of_artificial...

    Artificial intelligence (AI) has been used in applications throughout industry and academia. In a manner analogous to electricity or computers, AI serves as a general-purpose technology that has numerous applications, including language translation, image recognition, decision-making, [1] [2] credit scoring and e-commerce.

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