A company from California, the US, has introduced a new medical procedure, which can turn brown eyes blue.

近日，美国加利福尼亚州的一家公司引进一项新手术，可将棕色眼睛变成蓝色眼睛。

The laser procedure works by eliminating the melanin from the surface of the iris¹, which then allows light to enter and scatter² in the stroma.

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，分散在基质上，从而使眼睛呈现出蓝色。

The effect is similar to Rayleigh scattering³, in which wavelengths⁴ of sunlight hit much smaller molecules⁵ in the air and then scatter, which makes the atmosphere appear blue.

其效果与“瑞利散射”类似，即阳光的波长碰撞空气中较小的分子散射开来，使得大气呈现蓝色。

The laser treatment disrupts the fragile layer of pigment⁶ on the iris, which causes the body to start removing the tissue naturally.

激光手术破坏了虹膜上纤巧的色素层，使得人体自然地消除掉这些组织。

While the procedure itself only takes around 20 seconds, the blue eyes do not emerge for several weeks, as the body can only gradually release the pigment.

尽管手术本身仅需20秒左右，但要经过好几个礼拜眼睛才会变成蓝色，因为人体只能逐渐地释放那些色素。

Stroma Medical is currently in the fundraising stage as it searches for investors⁷, but hopes to have completed clinical trials within a few years.

由于基质医学公司正在寻找投资人，目前该公司正处于融资阶段。不过这家公司希望能够在几年内完成临床试验。

Currently, the price to change brown eyes blue stands at a relatively⁸ high amount of $5,000.

目前，将棕色眼睛变成蓝色眼睛的费用相对较高，需5000美元。