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Statistical Distributions of CNR Values and Paired t-Test Result for Both Systems
| Parameter |
Low-Cost OCT |
Heidelberg Spectralis |
| Mean CNR ± std error | 1.592 ± 0.021 | 1.687 ± 0.027 |
| 95% Confidence interval | 1.551–1.634 | 1.634–1.740 |
| Range | 0.984–2.232 | 0.877–2.546 |
| Mean CNR difference ± std error | 0.09 ± 0.02 | |
| Paired t-test P value | <0.0001 | |
