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为什么它没有# 8217 t天黑时我们眨眼吗

整理: admin时间: 2018-09-27

Every few seconds, our eyes automatically blink。 It’;s so ****** and natural we don’;t even think about it (sorry if you’;re now blinking manually)。 But blinking is strange, at least in one regard: it doesn’;t get dark。 You’;d think that blinking so often would create intermittent lights-out phases, but that doesn’;t happen。 Now, researchers think they know why。

Blinking and focusing

Photo by Ahmed Sinan。

Blinking is an essential eye function, helping to lubricate eyes, spread tears across, and remove irritants from the surface of the eye。 But that’;s not all it does。 Researchers from UC Berkeley, Nanyang Technological University in Singapore, Université Paris Descartes, and Dartmouth College have found that blinking helps reposition our eyes so that we can stay focus on whatever we’;re viewing。

When we blink, our eyeballs roll back —; but when we open our eyes, they don’;t always return exactly to the same place。 This misalignment prompts our eye muscles to realign our vision, which helps keep our focus。 Gerrit Maus, who initiated the research, explains:

“;Our eye muscles are quite sluggish and imprecise, so the brain needs to constantly adapt its motor signals to make sure our eyes are pointing where they’;re supposed to,”; Maus sai********>“;Our findings suggest that the brain gauges the difference in what we see before and after a blink, and commands the eye muscles to make the needed corrections。”;

An interesting consequence of this is that our vision doesn’;t get dark or blurry when this happens。 This mechanism keeps our day to day vision fluent but without it, everything would seem jittery and somewhat erratic, researchers say。

本文源自: 揭秘环亚娱乐骗局

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