One of my players wants to build a totally blind character, and so far as I can tell the system has no rules for it, despite coming close.
Blinded is a condition that more accurately reflects having dirt thrown in your eyes, and seems to explicitly not apply in this case:
The creature can’t see, which means its targets have total concealment against it. The creature takes a -10 penalty to Perception checks. The creature grants combat advantage. The creature can’t flank.
A blinded creature cannot have combat advantage against anyone.
This condition applies to creatures that have been temporarily blinded, such as by exposure to brilliant light or a magical darkness clouding their eyes. It doesn’t apply to creatures that are naturally blind (such as oozes).
Blind is both a keyword and a sense set aside for monsters, but they always have an alternate sense:
A blind creature relies on special senses, such as blindsight or tremorsense, to see within a specified range, beyond which the creature can’t see. The creature is immune to gaze attacks and cannot be blinded.
So, how might I mechanically represent a truly, naturally blind PC that also does not have any alternate senses? To clarify: My player is asking me for mechanics, in order to take on the challenge of overcoming them. We've run RP-only disadvantages in the past, but in this case I am specifically asked for rules to back it up.
blinded condition permanently looks simplest, but it doesn't feel right and I'd like to explore other options. I know the player has done a lot of research and plans to augment the PC with feats/features/items to help compensate whatever penalties this will give him, so don't worry about 'playable' blindness; he feels he can make that happen regardless.
I realize this question is asking for rampant speculation, but please cite (preferably 4e) mechanical inspiration whenever possible. [consideration of potential ramifications in play is also welcome]