Here's how I would write it, with view to sharp & short:
(The f) Fatigue (that) followed the sleepless night. (was not unwelcome.) His senses laboured underwater: (sound) muffled sound, (vision) blurred vision, dampening (his) the fear (at) of facing his neighbour.
Sorry, we don't have a strike-out tool here, so I used brackets to show what I'd cut out. Cutting out "was not welcome" does not alter the sentence, as we all know that fatigue is never welcome, obviously.
I inverted nouns & qualifiers to sharpen the meaning, and cut a repetion "his".
The sentence in bold is how I'd write it.
All the best with your writing!... Sounds intriguing...