system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to an eyelash when it disappears behind your eyeball?

Does it dissolve? Additionally, what about other objects such as sand?
gpt
Nothing can ever go behind your eyeball.  The entire circumference is attached to the muscles that move the eye.  So whatever gets in simply stays trapped somewhere, usually up under the eyelid.

And no, nothing ever dissolves.  You keep producing more tears to flush it out until it's gone.

Source: going on 11 years as a certified optician.