初級會話2014-09-17 The eye is like a camera with a “shutter” that lets in light, a lens that focuses the image, and light-sensitive chemicals (just like film) on which the image is registered. The eye itself is ball-shaped with slight bulge at the front. In the middle of the eye is a hole called the pupil, which opens into the inner dark region of the eye. Light passes through the pupil to the lens, which focuses the light to create a picture at the back of the eyeball.
Posted on: Thu, 18 Sep 2014 00:42:38 +0000
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