Blind:

You are considered to be Defenseless.

You automatically Fail any Perception roll that involves seeing.

You have a -6 penalty to all other rolls that involve seeing.

This includes Attacks, in which case all opponents are considered to be Concealed from you.

Stun:

Defenseless, Harmless, and Immobilized.

You fall Prone if Stunned for longer than 1 Round.