I'd note that the phrase "further retinal damage and visual loss" implies that retinal damage and visual loss has already occurred... how much of that you are w

I'd note that the phrase "further retinal damage and visual loss" implies that retinal damage and visual loss has already occurred... how much of that you are willing to tolerate is up to you, I suppose: I'd prefer 0 unless necessary. If the retinal damage is saving me from a death at the hands of COVID-19 maybe it's worth it, but if it's not...