Distance from fovea (mm) ON (μm) Mean ± SD 26 eyes  Non-ON (μm) Mean ± SD 38 eyes P value
SFCT 314.53 ± 53.10 335.55 ± 70.93 0.204
T1 312.92 ± 65.45 327.63 ± 68.23 0.393
T2 305.50 ± 57.13 316.05 ± 71.81 0.534
N1 302.96 ± 65.46 322.84 ± 74.98 0.278
N2 301.19 ± 73.19 311.94 ± 70.22 0.556
SFCT: subfoveal choroidal thickness; T1: choroidal thickness at 500 μm temporal to the fovea; T2: choroidal thickness at ,000 μm temporal to the fovea; N1: choroidal thickness at 500 μm nasal to the fovea; N2: choroidal thickness at ,000 μm nasal to the fovea; ON: optic neuritis.
Table 3: The mean choroidal thickness measurements of MS patients with ON and non-ON.