What is "al-qadha," what is its description, is it ritually impure, and is it like dipping the eye?

The origin of “qadha” (foreign matter) in the eye and drink is whatever falls into them. “Ghamas” (eye discharge) is also a form of it. “Qadha of the eye” is pure unless it is blood.

What corresponds to the man’s “madhy” (pre-seminal fluid) that exits from a woman’s private parts may be called “qadha,” and this is impure because the Prophet commanded the washing of the penis from it. It is usually a thin, yellowish fluid that exits with a weak arousal.