Most causes of untreatable blindness occur due to loss of the millions of light sensitive photoreceptor cells that line the retina, similar to the pixels in a digital camera.
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At 16, Lynda Johnson was ready to learn how to drive. Yes, she had a progressive eye disease, retinitis pigmentosa, which already had stolen her night vision. But throughout her childhood, the Millbrae, California, girl had ...
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Unintentional injury is the leading cause of pediatric death in the U.S. and motor vehicle crashes (MVCs) are the most common cause of injury. A new paper published in the Journal of Pediatrics by researchers at Center for ...
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Swiss researchers said Monday they have developed a wireless camera system to monitor vital signs in premature babies, a move that could replace uncomfortable and highly inaccurate skin sensors.
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It's the part of the eye exam everyone hates: the pupil-dilating eye drops. The drops work by opening the pupil and preventing the iris from constricting in response to light and are often used for routine examination and ...
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A "smart" needle with an embedded camera is helping doctors perform safer brain surgery.
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With a little help from chickens and video cameras, scientists have captured live the moment when skin gets darker. In a study appearing in Scientific Reports, a Japanese team has filmed and demystified the process by which ...
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Every day, we rely on our physical surroundings—friends, gadgets, and even hand gestures—to manage incoming information and retain it. In a Review published August 16 in Trends in Cognitive Sciences, two researchers explain ...
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The University of Montreal Hospital Research Centre (CRCHUM) is launching a major international clinical trial to test a minimally invasive and safer surgical approach for patients with lung cancer: video-assisted thoracoscopic ...
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A miniature camera using optical character-recognition technology, mounted onto the eyeglasses of people who are considered legally blind, dramatically improves their ability to read an email, newspaper article, menu or page ...
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A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.
Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.
A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.
This text uses material from Wikipedia, licensed under CC BY-SA
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