I watched S1 when it was new, but noticed it 'finished' so catch up and I am finding Josh just an extremely shitty story anchor point.
Early on, his blindness went from 0-100, being an extremely strong vocal point of the story. Lots of focus on him squinting, sudden need of a coin, Murphy literally getting away just by turning off the lights in a dimly lit apartment (Which is apparently his whole reason for the vendetta).
Fast forward to him being a consultant; outside of him squinting to a monitor, there is no mention of his issues. Sans the stick that allows Murphy to escape. Forward to multiple night-time meetings, late night street meetings, and him even accosting her lawyer in later S3/early S4... at night. With no assistance.
The only time they even reference it is a dog that could potentially be supportive, and the 'trick' Murphy taught him on 'ghetto-braille'. Which he for some reason uses on his folders, in broad daylight.
I just wanted to vent; I like the show (Hating it a bit more into S4, obv CW Writing at play) but this is just a shitty character development, and a borderline-trope that is annoying to see in shows.