Yes, I was not clear here (I clarified in another comment) - I meant if you are blind, you cannot get "blinder". There are other risks of course, which I addre

Yes, I was not clear here (I clarified in another comment) - I meant if you are blind, you cannot get "blinder". There are other risks of course, which I addressed in the comments (basically, it is for an individual to decide whether they want to accept risks, also in the case where the risks are not quantifiable)