| Scoring criteria | Positive(+1 point) if inter-eye difference |
|---|---|
| Mean anterior keratometry | >=0.3 diopters |
| Mean posterior keratometry | >=0.1 diopters |
| Thinnest pachymetry | >=12 μm |
| Front elevation at thinnest location | >=2 μm |
| Back elevation at thinnest location | >= 5 μm |
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