[quote=@One Who Tames]

Default visions are normal light, low light and dark.  Normal light is what we all see normally.  Nothing special.  Dark vision is the ability to see in pitch black with no light source bit suffer from light blindness during the day; basically a reversal of light vision.  Low light is like cat’s eyes.  Lowligjt vision can enhance small amounts of light to see at night and such.  Low light does not let people see in pitch black and makes you vulnerable to sudden drastic changes in luminosity (bright to dark or dark to bright) as the eyes try to adjust.  Low light especially is vulnerable at dusk and dawn when the light changes.

[/quote]

How bad is light blindness? I'm considering getting dark vision for my character. 

Btw, interesting (and logical) mechanic for vision. I'm used to the D&D version where there are no downsides to low light or dark vision.