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Depending on your vision, the right kind of lens helps your eye focus light properly and projecta clear image onto the retina.
取決于你的視覺，合適的眼鏡會幫助眼睛準確的聚焦光線，在視網(wǎng)膜上形成一個清晰的影像。
Ok, fine, but why do contacts make things seem so clear?
好，就算如此，但為什么隱形眼鏡使事物看起來很清楚呢？
Patience, young patience.
別急，耐心聽完。
Glasses have what's called an optical center, which means that objects appear clearest when viewed through the center of the lenses.
眼鏡有所謂的光心，這意味著通過鏡片的中心時視野會變得最清晰。
But when you're wearing glasses and you move your eyes to the side, or up, or down, things can seem slightly distorted or blurry.
但是當戴上眼鏡，眼睛左右移動，或上下轉(zhuǎn)動，似乎視野會變得輕微扭曲或模糊。
So because contacts are right on the eye and move with the eye, there's no optical center.
所以，因為隱形眼鏡恰巧在眼睛上而眼睛移動的時候沒有光心。
Right. Put another way, the entire contact lens is the optical center.
沒錯。換句話說，整個隱形眼鏡就是光心。
So no matter which way you move your eyes, objects appear in perfect focus.
所以，無論以何種方式移動眼睛，物體都出現(xiàn)完美的焦點。
And that's why everything seems so much clearer!
這就是為什么視野突然清晰很多的原因！
Like this eraser, and this envelope. . .
比如這塊橡皮擦,這個信封…
I get it, Don.
我明白了，唐。
譯文來自可可英語
