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In October of that year, Canva announced that it had raised an additional A$85 million at a valuation of A$3.2 billion and launched an enterprise product. [20] In December 2019, Canva announced Canva for Education, a free product for schools and other educational institutions intended to facilitate collaboration between students and teachers. [21]
Artist's impression of Leonardo's method for neutralizing the refractive power of the cornea. Leonardo da Vinci is frequently credited with introducing the idea of contact lenses in his 1508 Codex of the eye, Manual D, [9] wherein he described a method of directly altering corneal power by either submerging the head in a bowl of water or wearing a water-filled glass hemisphere over the eye.
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]
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The chart was designed by Ian Bailey [5] and Jan E. Lovie-Kitchin at the National Vision Research Institute of Australia. [1] [3] They described their motivation for designing the LogMAR chart as follows: "We have designed a series of near vision charts in which the typeface, size progression, size range, number of words per row and spacings were chosen in an endeavour to achieve a ...
Hurricane season: Deadly season ends with at least 335 US deaths Wind chill advisories in Northern US. Thanks to that Arctic outbreak of cold air blasting from the northern Plains into the Midwest ...
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WASHINGTON (Reuters) -U.S. President-elect Donald Trump is considering dropping his nominee to lead the Pentagon, Pete Hegseth, and nominating Florida Governor Ron DeSantis in his place, the Wall ...