All the best to your bud, sorry to hear that.
I've allways know I have a relativetly rare eye condition since mid teens, turns out mine is about the mildest version - my corneas will not split
and fall off!! (still wondering if i just had a few sadistic student eye doctors as a kid) Any who, loosing my eyesight before time has allways been
in the back of my mind.
I have allways done a few things that may be revelent here - such as juggling, good cordination etc, riding m/bikes in traffic really shrpens up your
periferial vision, comiting room layouts to memory (but not trying to hard cos when you need to remember hard you usually get it wrong) and all other
things like counting change without removing it from pocket or working 'blind' on engines etc puts fine feel into your fingertips. All good cos you
never know when all the lights are gonna go out, or disaster strikes, also good when tring to give up smoking!
I'm saying all this, any one who knows me still tinks im clumsley - but i'm usually board and playing with stuff
p.s juggling very good exercise with 900 gram balls!