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Percentage of patients that lost two or more lines of corrected distance visual acuity (CDVA) 6 months after intracorneal ring segment implantation
| Keratoconus | Lost ≥ 2 lines CDVA ( %) |
|---|---|
| Grade I | 37.83 |
| Grade II | 20.68 |
| Grade III | 9.45 |
| Grade IV | 4.65 |
| Grade Plus | 3.70 |
