AIM: To evaluate the effect of soft contact lens using after excimer laser corneal refractive surgery as a physical barrier.
目的：了解亲水性软性角膜接触镜作为物理屏障在准分子激光屈光性角膜手术的作用。
He USES a common diode laser, a simple lens and a power supply to generate an infra-red barrier that can cover a door or window.
他使用普通二极管激光、一简单镜片和电源来产生红外线屏障覆盖门窗。
By creating an artificial guide star in any part of the sky, the Keck Observatory's laser removes that barrier.
通过在天空的任何部位创造一个人造导向星，Keck天文台的激光扫除了这个障碍。
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