一双美丽的大眼睛通常都被视为相貌上的优势,可英国眼科专家却表示,大眼睛的人更容易得近视眼。所以从这个角度来说,大眼睛反而成了一个弱点。专家指出,近视眼是由于外界光线焦点没有正确落在视网膜上而造成的,大眼睛的人因为眼球太大而导致外界光线焦点没有落在视网膜上,而是落在视网膜前方,因而无法在视网膜上形成清晰的图像。与此相反,眼睛小的人更容易得远视眼,也就是外界光线焦点落在视网膜后方。
英国患近视眼的人在不断增加,目前全国约有一半人是近视眼。专家表示,眼睛前后直径平均值为24毫米,比这个数值高出1毫米,眼睛就会明显近视;而高出2到5毫米则是高度近视。专家解释称,现在近视的人越来越多可能是因为大家待在室内的时间过多,外界自然光线会让眼球自动调节生长状态,避免眼球过大,而室内的人造光线则没有这个功效。
Rebecca Large has always been told her big brown eyes are her best feature. Like those of Hollywood stars Angelina Jolie and Audrey Hepburn, Rebecca's eyes are regarded by most as a sign of beauty.
Yet eye experts have realised that far from being an asset, large eyes can actually be a weakness, and make someone more prone to being short-sighted.
This condition, also known as myopia, causes distant objects to appear blurred, while close ones can be seen clearly. It is caused by light not properly reaching the retina, the light- sensitive area at the back of the eye.
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