Comparison of lamellar thickness of anterior, middle and posterior stroma between KC and normal corneas
| Stromal zone | Corneal area | Lamellae thickness (nm) (mean±SE) | p Value* | |
| KC (n=sample size) | Normal (n=sample size) | |||
| Anterior stroma | Centre | 600.84±25.10 (n=233) | 1065.03±50.40 nm (n=143) | 0.0001 |
| Periphery | 686.84±46.47 (n=174) | 1168±62.03 nm (n=130) | 0.0001 | |
| Middle stroma | Centre | 1151.1±65.48 (n=204) | 2289.28±116.83 nm (n=114) | <0.0001 |
| Periphery | 1030.3±86.25 (n=153) | 2244.95±106.79 nm (n=113) | <0.0001 | |
| Posterior stroma | Centre | 783.57±31.10 (n=240) | 2050.86±124.30 nm (n=107) | <0.0001 |
| Periphery | 615.68±30.94 (n=225) | 2264.88±101.04 nm (n=93) | <0.0001 | |
| Mean lamellar | Centre | 828.76±25.753 (n=677) | 1738.24±62.28 nm (n=364) | 0.0001 |
| Periphery | 752.79±31.978 (n=552) | 1834.05±58.97 nm (n=336) | 0.0001 | |
*Mann-Whitney test.
KC, keratoconus; n, number of lamellae; SE: standard error.