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Rectaflex (Italy): first SLR camera equipped with a pentaprism for eye-level viewing. The first prototype of the Rectaflex was presented by Telemaco Corsi at the Milano Fair in April 1947. It was a wooden mock-up, with a mirror eye-level finder. This first prototype used a five-facet roof optic prism giving a left to right inverted image.
Reflective surface to send light back to viewer. (In a backlit LCD, this layer is replaced or complemented with a light source.) 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.
Myopia. Myopia, also known as near-sightedness and short-sightedness, [5] is an eye disease [6][7][8] where light from distant objects focuses in front of, instead of on, the retina. [1][2][7] As a result, distant objects appear blurry while close objects appear normal. [1]
The new handset also has bigger screens than before, going from a 7.6-inch internal display and a 5.8-inch cover screen to an 8-inch internal display and a 6.3-inch cover screen.
CAIRO (Reuters) -The U.S. offered to recognize the Houthi government in Sanaa in a bid to stop the Yemeni rebel group's attacks, a senior Houthi official said on Monday, in remarks that a U.S ...
WASHINGTON (Reuters) -Russian state media outlet RT is using American and other personalities to try to sway U.S. voters into backing Republican presidential nominee Donald Trump over his ...
The most common example occurs when the absorbed radiation is in the ultraviolet region of the electromagnetic spectrum (invisible to the human eye), while the emitted light is in the visible region. This gives the fluorescent substance a distinct color that is best seen when it has been exposed to UV light, making it appear to glow in the dark ...
The earliest recorded mention of eye prosthetics is from the Egyptian story of the Eye of Horus dates circa 3000 BC, which involves the left eye of Horus being plucked out and then restored by Thoth. The Egyptians were also early pioneers of foot prosthetics, as shown by the wooden toe found on a body from the New Kingdom circa 1000 BC. [76]
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