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Myopia can be corrected with eyeglasses, contact lenses, or by refractive surgery. [1] [16] Eyeglasses are the simplest and safest method of correction. [1] Contact lenses can provide a relatively wider corrected field of vision, but are associated with an increased risk of infection.
Cataract surgery is the most common application of lens removal surgery, and is usually associated with lens replacement. It is used to remove the natural lens of the eye when it has developed a cataract, a cloudy area in the lens that causes visual impairment. [4][10] Cataracts usually develop slowly and can affect one or both eyes. [4]
The history of the single-lens reflex camera (SLR) begins with the use of a reflex mirror in a camera obscura described in 1676, but it took a long time for the design to succeed for photographic cameras. The first patent was granted in 1861, and the first cameras were produced in 1884, but while elegantly simple in concept, they were very ...
September 16, 2024 at 12:18 PM. A man accused of charging police with "a machete and hatchet" at a residence in Pennsylvania was shot by an officer over the weekend, officials said. At just after ...
The tetrahedron is one kind of pyramid, which is a polyhedron with a flat polygon base and triangular faces connecting the base to a common point. In the case of a tetrahedron, the base is a triangle (any of the four faces can be considered the base), so a tetrahedron is also known as a "triangular pyramid".
The peak of Mount Kailash is located at an elevation of 6,638 m (21,778 ft), near the trijunction between China, India and Nepal. Mount Kailash is located close to Manasarovar and Rakshastal lakes. The sources of four rivers: Indus, Sutlej, Brahmaputra, and Karnali lie in the vicinity of the region. Mount Kailash is sacred in Hinduism, Buddhism ...
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