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Blue eyes have historically been a significant measure of attractiveness, and although they’re commonly found among actors and models, only 17% of the global population has them. For the majority of people, approximately 80% of the population, blue eyes have been attainable only with the aid of colored contact lenses or artificial iris implants. But that will soon change with the introduction of a new medical procedure, pioneered by California company Stroma Medical, that can turn brown eyes blue. 蓝色眼睛一直被认为是美貌的一个重要衡量标准。尽管很多演员和模特都有蓝眼睛，但是从全球范围来看，只有17%的人口拥有蓝眼睛。对大多数人（80%）而言，蓝色眼睛只能靠佩戴有色隐形眼镜或植入人工虹膜来实现。不过，这一切很快就要改变了，美国加州基质医学公司率先引进的一项新手术可以让棕色眼睛变成蓝色。 The laser procedure works by eliminating the melanin from the surface of the iris, which then allows light to enter and scatter in the stroma. The effect is similar to Rayleigh scattering, in which wavelengths of sunlight hit much smaller molecules in the air and then scatter, which makes the atmosphere appear blue. 这项激光手术通过消除虹膜表面的黑色素，让光线得以进入虹膜，分散在基质层上，从而让眼睛呈现出蓝色。这一过程和瑞利散射的原理类似，当阳光的波长触及空气中的分子散射开来，天空就会呈现蓝色。 | 
