Why do our eyes sting when we get tired?

1.06K views

Why do our eyes sting when we get tired?

In: Biology

3 Answers

Anonymous 0 Comments

Our tear ducts produce a combination of liquids and oils to lubricate and protect the surface of the eye every time we blink. The quality of these tears goes down the longer we stay awake.

With lower quality tear film, parts of our eyes are exposed to the air and any irritants in it, causing it to become red and inflamed.

Closing our eyes during a full night’s rest allows the tear ducts to recover back to producing good quality tears.

Anonymous 0 Comments

[removed]

Anonymous 0 Comments

**Please read this entire message**

Your submission has been removed for the following reason(s):

* ELI5 requires that you *search the ELI5 subreddit for your topic before posting*.

There are no exceptions to this rule.

Users will often either find a thread that meets their needs or find that their question might qualify for an exception to rule 7.

Please see this [wiki entry](http://www.reddit.com/r/explainlikeimfive/wiki/how_to_search) for more details (Rule 7).


If you would like this removal reviewed, please read the [detailed rules](https://www.reddit.com/r/explainlikeimfive/wiki/detailed_rules) first. If you still feel the removal should be reviewed, please [message the moderators.](http://www.reddit.com/message/compose?to=%2Fr%2Fexplainlikeimfive&subject=Can%20you%20review%20my%20thread?)