Deformity (Eyes)( Book of Vile Darkness, p. 48)
The character has either drilled a hole in her forehead trying to add a third eye, or she has supernaturally scarred one of her regular eyes.
Willing Deformity (BoVD) ,
As a supernatural ability, the character can use see invisibility for 1 minute per day.
The character takes a -2 deformity penalty on Spot and Search checks.