At a mean of 16.1 days after fever onset, patients experienced initial symptoms including sudden vision loss, visual field constriction, nyctalopia, and dyschromatopsia, reported Xiaoyan Ding ...

At one year, 88% (7 of 8 patients) achieved visual acuity of 20/40 or better, with 50% (4 of 8) reaching 20/25 or better.