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Clinical findings in different keratoconus stages.
| KC 1 | KC 2 | KC 3 | p value | |
|---|---|---|---|---|
| OSDI | 30.1 | 32.5 | 33.8 | 0.027 |
| TBUT (sec.) | 5.2 | 5.1 | 4.6 | 0.79 |
| Schirmer II test (mm) | 5.9 | 5.3 | 4.8 | 0.07 |
| Meiboscore | 2.1 | 2.4 | 2.6 | 0.32 |
OSDI: Ocular Surface Disease Index; TBUT: tear breakup time.
