Cure blindness is a pretty useless spell, and should probably be removed or its effects folded into some other spell like extra healing or clairvoyance. Alternatively, if see invisible is nerfed so that it cannot be granted permanently, this could be folded into a “spell of true sight”, which grants temporary see invisible as well as curing blindness, perhaps temporary blindness resistance, and blocking (but not curing) hallucinations like Grayswandir’s wield effect.

Merge extra healing, cure sickness and cure blindness, and make the resulting spell level 6. Or just merge cure sickness with cure blindness, and call it “cure ailment”.

The spellbook of cure blindness can be read while blind.