You will be aware of a support (speculum), which helps to hold your eye open.

你会感受到一个撑子(扩张器)，它可以保持你的眼睛睁开。

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Now open your other eye.

好啦， 睁开你另一只眼睛吧。

《新英汉大辞典》

Before marriage to open your eyes, after marriage can want to open one eye and one eye closed.

结婚之前要睁开你的眼睛，结婚之后可要一只眼睛开一只眼睛闭。

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See, your eyelids actually spread a film of oil over your eyeball which protects a thin layer of tears that allow you to keep your eye open without it drying out.

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Second, if you've made a few attempts and your eye doctor's office is open, it's a good idea to call right away for advice.

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