Make blindness crippling (and not utterly disabling)

[Superlagg]

what if it made you totally unable to see but you can right click on tiles directly adjacent to you to "feel" your way around?

One of the major issues that comes from blindness is being unable to click on your spaceman. I need to rely on passers-by to feed me like a little baby birdie. Though it is kinda fitting that the crew cant find their mouth with both hands and a map.

Blindness could also interfere with using manufacturers and vending machines. All the labels would show up blank (Cus NT aint springing for braille).