By practicing this exercise daily, the retina will be gradually accustomed to brighter light. Progressively your eye can function efficiently at any range of light intensities.

通过每天的锻炼，视网膜能够逐渐适应较强的光线，你的眼睛逐渐地能够在较大范围的光线强度内正常工作。

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Spitzer's infrared instruments return reams of data to Earth as the orbiting observatory gathers light from far reaches of the universe, light that is invisible to the naked eye.

斯皮策太空望远镜在沿着轨道旋转时，收集了来自广阔太空的各种光线，这些光线对于肉眼来说是不可见的，但红外设备可以观测到，观测结果形成数据被传回地球。

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The iris works just like the iris on a camera; if it's a bright day, and lots of light tries to enter the eye, then the iris will close down limiting the amount of light that can enter.

虹膜的工作机理如同照相机的光圈。天气晴朗时，虹膜将会变小以限制通光量。

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Degas and the Impressionists were interested in painting the effects of light, and how the human eye sees subjects.

VOA: special.2009.07.12

The others in the direct light sending the same number of photos to your eye.

那些直接处于光线之下的瓷片,向你的眼睛发出了同样多的图片。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Finally,a single ray of light shot from out and fell full upon the vulture eye.

VOA: special.2009.05.16

Gamma-rays are the most energetic form of light, with wavelengths far shorter than ordinary optical light (the light your eye can see), or even ultraviolet or X-ray light.

CNN: Why gamma-ray burst shocked scientists

Normal vision is based on more than one hundred million receptors in each eye that process light, say experts.

WSJ: FDA Approves Bionic Eye

What you see above is an LCD panel that refreshes at 240Hz, and delivering 3D at 60 frames per second to each eye, by using the typical active shutter glasses technique of blocking light to your left eye when the "right" image is displayed, and vice versa for the right eye.

ENGADGET: Sony's 24-inch PlayStation 3D 'dual-view' monitor: here's how it works