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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 power of any lens system can be expressed in diopters, the reciprocal of its focal length in meters. Corrective lenses for myopia have negative powers because a divergent lens is required to move the far point of focus out to the distance. More severe myopia needs lens powers further from zero (more negative).
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
More. Jaromír Jágr scored the first goal of his 37th professional season on Friday during HC Rytíři Kladno's 4-2 win over HC Sparta Praha in the Czech Extraliga. The 52-year-old Jágr netted ...
How 3 young Americans ended up in the middle of a coup attempt in Congo and facing a death penalty. Tyler Thompson, left, Marcel Malanga and Benjamin Reuben Zalman-Polun, all American citizens ...
Lego keeps building on its lead versus toy rivals. The maker of the iconic Lego brick reported Wednesday that first-half revenue rose 13% year over year to 31 billion Danish kroner ($4.64 billion).
In 1999, Nikon and Essilor have signed a Memorandum of understanding to form a global strategic alliance in corrective lenses by forming a 50/50 joint venture in Japan to be called Nikon-Essilor Co. Ltd. The main purpose of the joint venture is to further strengthen the corrective lens business of both companies.
Investors are increasingly confident the US economy will achieve a "soft landing," a scenario in which higher interest rates lead to lower inflation without a major hit to economic growth. On the ...
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