Which types of spells can a Blinded caster still target as accurately as usual? Which ones require extra steps or give penalties because of blindness? Which ones can simply not be targeted at all, thus not cast?
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Range: Personal or targeted at yourself
Has a Target entry
When blind, your only solution is to touch the target. If you are the target, this is automatic. Otherwise, the Invisibility entry of the Glossary provides an option when the location of a target is unknown:
Also, a creature with a normal reach hitting you reveals its position:
This would allow you to target it with a regular Touch Attack, with the usual 50% miss chance for Total Concealment.
Ray spells are considered ranged attacks and allow trying to hit unseen targets:
Creation or Summoning
As long as you can describe the location, you can cast the spell. As such, Summoning spells can be used when blind.
You do not need to see creatures to catch them within an Area spell. By default, you actually cannot pick which creatures are affected, just the area.
There is no indication that you need to see the point of origin of the spell:
You just "select" it, which I assume is the same as "designating a location" with creation and summoning spells.