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Table 1 Mean values of CRT, PROS, FOSPET and FPR across visual acuity groups

From: Quantifying microstructural changes in retinitis pigmentosa using spectral domain – optical coherence tomography

Visual acuity subgroup

Normal

Mild visual impairment

Moderate visual impairment

P value

CRT (μm)

237 ± 49

216 ± 40

173 ± 101

0.008

PROS (μm)

52 ± 9

38 ± 10

34 ± 9

0.001

FOSPET (μm)

79 ± 11

63 ± 12

61 ± 10

0.001

FPR

1.53 ± 0.13

1.65 ± 0.19

1.90 ± 0.23

< 0.001

  1. CRT = central retinal thickness; PROS = photoreceptor outer segment; FOSPET = foveal outer segment pigment epithelial thickness; FPR = FOSPET:PROS ratio