Spellbook of cure blindness
+ cure blindness
|Turns to read
|Ink to write
Casting this spell simply cures intrinsic blindness.
As there are multiple methods to cure blindness, including unicorn horns and spells of healing (at Skilled) and extra healing, the spell is rarely of much value outside on-demand confusion, and the spellbook a prime candidate for polypiling or blanking and overwriting.
The spellbook of cure blindness and its spell first appear in NetHack 1.3d.