Ethambutol-induced optic neuropathy with rare bilateral asymmetry onset: A case report

Figure 2 Computer perimetry results of four follow-up visits. A: At the initial visit, there were suspicious dark spots in the inferonasal region of the right eye, and the visual field defect of the left eye manifested as concentric contraction; B: At the second visit, visual field defects had worsened in the right eye; C: At the third visit, the defect showed progression in the left eye, but improved in the right eye; D: At the fourth visit, the visual field in both eyes improved.