I just got my watch yesterday and I also was having a hard time seeing it.
Once I was able to link it to my smart phone ( iPhone ) then after about 15 minutes I could make it barely that an updates was available,
it said this update would take 3 minutes to download.
Once I allowed the update - the normal screen got much brighter
not glow in the dark bright but at least watch tv with the lights down bright
I hope this helps someone else