So Neilsen and colleagues used a new technique based on the lens of the eye.

所以尼尔森和同事采用了一项以眼睛晶状体为基础的新技术。

When we're young, the lens of the eye is flexible and can change shape to bring images into focus, something called accommodation.

当我们年轻时，眼睛的晶状体是有弹性的可以改变形状使得图像在焦距内，某种东西叫做适应性调节。