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  1. Refractive surgery. Refractive surgery is optional eye surgery used to improve the refractive state of the eye and decrease or eliminate dependency on glasses or contact lenses. This can include various methods of surgical remodeling of the cornea ( keratomileusis ), lens implantation or lens replacement.

  2. Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body. MRI does not involve X-rays or the use of ionizing ...

  3. en.wikipedia.org › wiki › LaserLaser - Wikipedia

    A telescope in the Very Large Telescope system producing four orange laser guide stars A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation.

  4. Neurodiversity is a framework for understanding human brain function that recognizes the diversity of human cognition as a biological fact. The neurodiversity paradigm argues that diversity in human cognition is normal and that some conditions classified as mental disorders are differences and disabilities that are not necessarily pathological .

  5. en.wikipedia.org › wiki › ALSALS - Wikipedia

    Amyotrophic lateral sclerosis ( ALS ), also known as motor neurone disease ( MND) or Lou Gehrig's disease in the United States, is a rare but terminal neurodegenerative disorder that results in the progressive loss of both upper and lower motor neurons that normally control voluntary muscle contraction. [3] ALS is the most common form of the ...

  6. Fibonacci sequence. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes ...

  7. Greta Tintin Eleonora Ernman Thunberg (Swedish pronunciation: [ˈɡrêːta ˈtʉ̂ːnbærj] ⓘ; born 3 January 2003) is a Swedish environmental activist known for challenging world leaders to take immediate action to mitigate the effects of human-caused climate change.[1] Thunberg's climate activism began when she persuaded her parents to ...

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