Aldaka

An aldaka is a dark red mushroom that grows underground, away from daylight. Prepared with a skillful mixture of oils and spices, it makes a maceration with an ignoble smell which has the virtue of immediately restoring sight to a blind creature if it is applied directly to the eyes.
A creature who temporarily suffers from the blinded condition and on whom this cream is applied recovers their sight immediately. In addition, a creature who is permanently blinded for natural reasons has 50% of chance to recovering their sight after applying it for 10 minutes, provided their eyeballs are perfectly intact.