Table 1 Changes in corrected distance visual acuity (CDVA) from preoperative to postoperative 6 months (M) after intracorneal ring segment implantation

0.05 ± 0.05

(0.05 to − 0.10)

0.08 ± 0.20

(0.40 to − 0.11)

0.15 ± 0.10

(0.22 to 0.08)

0.14 ± 0.20

(0.50 to − 0.11)

0.35 ± 0.51

(0.40 to 0.26)

0.26 ± 0.20

(1.00 to 0.00)

0.57 ± 0.06

(0.70 to 0.42)

0.30 ± 0.20

(1.30 to 0.00)

1.10 ± 0.06

(0.01 to 0.15)

0.42 ± 0.25

(1.30 to 0.00)