I waited until I was mostly blind in my left eye and the right was maybe 6-9 months behind, assuming it continued to progress consistent with the left. Driving

I waited until I was mostly blind in my left eye and the right was maybe 6-9 months behind, assuming it continued to progress consistent with the left. Driving at night had already been out-of-the-question for a while, and soon I would be unable to work, at least without learning an entirely new physical workflow. At that point 1/20 is great. (It all worked out very well for me.)