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The probability of having complete recovery to 20/20 VA (green), good recovery (20/40 or better, yellow), medium recovery (between 20/40 and 20/200, orange), and poor recovery (20/200 or worse, red) is stratified based on time from optic neuritis onset to the initiation of plasma exchange (among the 395 optic neuritis attacks treated with plasma exchange without a prior optic neuritis attack).
