Table 1.
Changes in corrected distance visual acuity (CDVA) from preoperative to postoperative 6 months (M) after intracorneal ring segment implantation
| CDVA | Preoperative | Postoperative 6 M | P value |
|---|---|---|---|
| Grade I |
0.05 ± 0.05 (0.05 to − 0.10) |
0.08 ± 0.20 (0.40 to − 0.11) |
< 0.01 |
| Grade II |
0.15 ± 0.10 (0.22 to 0.08) |
0.14 ± 0.20 (0.50 to − 0.11) |
0.04 |
| Grade III |
0.35 ± 0.51 (0.40 to 0.26) |
0.26 ± 0.20 (1.00 to 0.00) |
< 0.01 |
| Grade IV |
0.57 ± 0.06 (0.70 to 0.42) |
0.30 ± 0.20 (1.30 to 0.00) |
< 0.01 |
| Grade Plus |
1.10 ± 0.06 (0.01 to 0.15) |
0.42 ± 0.25 (1.30 to 0.00) |
< 0.01 |