PMC10148233_01
Examination of the visual field. At 4 days after the left visual loss, Humphrey visual field testing revealed a superior altitudinal and inferior peripheral defect in the left eye. By contrast, at 6 weeks after the left visual loss, the testing revealed a complete defect in the left eye and, despite the suboptimal quality, a superior defect in the right eye.
crn529837_f01.jpg
PMC10148233_01_crn529837_f01.jpg
F1
Later, visual perimetry disclosed superior altitudinal and inferior peripheral defects in the left eye and an equivocal superior visual defect in the right eye (shown in Fig. 1). Six weeks after visual loss, visual perimetry revealed a total defect for the left eye, and despite the suboptimal quality, a superior defect for the right eye without impaired visual acuity or subjective visual problems (shown in Fig. 1).
Fundus examination. At 2 weeks after the visual loss, fundoscopy revealed a normal-appearing optic disc in the left eye, without disc edema, hemorrhage, retinal detachment, or maculopathy. The fundoscopy of the right eye was overall normal.
crn529837_f02.jpg
PMC10148233_01_crn529837_f02.jpg
F2
Fundoscopy demonstrated a normal-appearing optic disc with normal retina, macula, and retinal vessels (shown in Fig. 2).
Optical coherence tomography. Optical coherence tomography of the retinal nerve fiber layer (RNFL) at 6 weeks after the onset of visual loss revealed RNFL loss and a pale optic disc in the left temporal eye, normal RNFL thickness, and disc in the right eye, with no signs of macular edema or epiretinal membrane in both eyes.
crn529837_f03.jpg
PMC10148233_01_crn529837_f03.jpg
F3
Optical coherence tomography disclosed left temporal pallor and a loss of the retinal nerve fiber layer in the left temporal eye (shown in Fig. 3).