The blindness status works by lowering fog distance. Disabling fog entirely allows the player to see normally.

Fog "vanilla":

Fog "subtle":

Fog "none":

Tested on 1.0.1095-snapshot

Oh, I see. This is probably an easy fix. I'll have a look.

I'd like to add more granular control of fog later, but this is at least better for now.

Tried reproducing this fog issue and sure enough the problem is present, However this also applies to sodium (See image) and other mods that make use of the fog removal check.