Right, and since the loss of sight is an inherent weakness in any of us, that it can be easily compromised and the most likely situation a person can end up defending themselves in, then it stands to reason that we should all be so restricted, unless we can demonstrate that we will wear suitable eye protection and always maintain an area of illumination around ourselves so that we can readily distinguish our intended targets.
How about if you go to the range to qualify for a CCW and the new requirement is that you have to score a certain number of hits with the range completely dark. That is a plausible self defense scenario, and since none of us has built in night vision, that would be a disqualifier as well.
I dunno, I am getting pretty rummy from lack of sleep, so maybe this is just a rambling. I will refrain until I can get some more rest for a while.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)