rebaba
1. f. Porción de materia sobrante que sobresale irregularmente en los bordes o en la superficie de un objeto cualquiera; como la argamasa que forma resalto en los ladrillos al sentarlos en obra.
https://dle.rae.es/rebaba

rebaba nf (materia sobrante)
leftovers npl
leftover material adj + n
burr n
https://www.wordreference.com/es/en/translation.asp?spen=reb...

In the context of a foreign body in the eye, debris is the usual term. Rebaba doesn't specify what kind of material it is, so the more literal "burr" is not commonly used in this context.

mote
/mōt/
noun
a tiny piece of a substance.
"the tiniest mote of dust"

Wikipedia
https://en.wikipedia.org › wiki › The_Mote_and_the_...
The analogy used is of **a small object in another's eye** as compared with a large beam of wood in one's own. The original Greek word translated as "mote" (κάρφος

https://medium.com › the-1000-day-mfa › on-a-mote-...
**On a Mote of Dust Suspended in a Sunbeam**. Write about your world today. Envy ... a mote of dust suspended in a sunbeam.” — Carl Sagan. That's a longer quote ...

Bible, King James Version
University of Michigan
https://quod.lib.umich.edu › cgi › kjv › kjv-idx
[4] Or how wilt thou say to thy brother, Let me pull out **the mote out of thine eye**; and, behold, a beam is in thine own eye? [5] Thou hypocrite, first cast out

As we can see "rebaba" is a foreign body in the eye. In the following website there is also some questions about the treatment: https://litfl.com/something-in-my-eye-doc/