Table 2 Comparison of choroidal parameters among IRD groups and healthy controls

Total Choroidal Area

2.24 ± 0.53

2.29 ± 0.74

2.53 ± 0.97

2.62 ± 0.61

2.49 ± 0.5

Statistically significant different groups (P-value)**

Control (< 0.001)

RP (< 0.001)

Luminal Area

1.46 ± 0.38

1.43 ± 0.5

1.57 ± 0.62

1.82 ± 0.46

1.78 ± 0.35

Statistically significant different groups (P-value)**

Control (< 0.001)

Usher Syndrome

(P = 0.045)

Control (0.015)

Usher Syndrome

(P = 0.045)

RP (< 0.001)

CRD (0.015)

CVI

0.65 ± 0.06

0.62 ± 0.04

0.62 ± 0.04

0.69 ± 0.04

0.72 ± 0.04

Statistically significant different groups (P-value)**

Control (< 0.001)

Control (< 0.001)

Usher (0.005)

Control (0.003)

Usher (0.045)

CRD (0.005)

LCA (0.045)

RP (< 0.001)

CRD (< 0.001)

LCA (0.003)

Stromal Area

0.77 ± 0.22

0.86 ± 0.25

0.96 ± 0.39

0.8 ± 0.2

0.7 ± 0.2