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Contact lenses can provide a wider field of vision and fewer artifacts than even double aspheric lenses. Refractive surgery aims to permanently change the shape of the eye and thereby cure astigmatism. In Europe and Asia, astigmatism affects between 30% and 60% of adults. People of all ages can be affected by astigmatism.
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] Other symptoms may include headaches and eye strain.
Retinopathy of prematurity ( ROP ), also called retrolental fibroplasia ( RLF) and Terry syndrome, is a disease of the eye affecting prematurely born babies generally having received neonatal intensive care, in which oxygen therapy is used because of the premature development of their lungs. [2]
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: If each box of a brand of cereals contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be ...
Red–green: 8% males, 0.5% females (Northern European descent) [2] Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation ...
Males comprise 80% of open globe injuries, with men between 10 and 30 years of age at the most significant risk. The mechanism and classification of open-globe injury may also vary by age. Penetrating eye lacerations due to pellet-gun, sport, motor vehicle, or fight-related injuries are more common in adolescent males.
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