Table 1. Demographics of eyes undergoing implantable collamer lens (ICL) implantation with and without a central artificial hole.
| Hole ICL group | Conventional ICL group | P value | |
| Age (years) | 30.3±5.8 years (95%CI, 19.0 to 41.6 years) | 30.4±6.1 years (95%CI, 18.4 to 42.3 years) | 0.75 |
| Gender (% female) | 36.8% | 42.1% | 0.82 |
| Preoperative | |||
| Manifest spherical equivalent (D) | −7.17±1.98 D (95%CI, -3.28 to -11.05 D) | −7.24±1.94 D (95%CI, -3.44 to -11.04 D) | 0.77 |
| Manifest cylinder (D) | −0.71±0.44 D (95%CI, 0.16 to -1.58 D) | −0.67±0.49 D (95%CI, 0.30 to -1.63 D) | 0.65 |
| LogMAR UDVA | 1.32±0.18 (95%CI, 0.97 to 1.67) | 1.37±0.19 (95%CI, 1.00 to 1.75) | 0.17 |
| LogMAR CDVA | −0.22±0.07 (95%CI, -0.09 to -0.35) | −0.21±0.08 (95%CI, -0.06 to -0.36) | 0.75 |
| Postoperative (3 months) | |||
| Manifest spherical equivalent (D) | −0.03±0.20 D (95%CI, -0.42 to 0.37 D) | −0.05±0.18 D (95%CI, -0.40 to 0.29 D) | 0.88 |
| Manifest cylinder (D) | −0.21±0.35 D (95%CI, -0.89 to 0.46 D) | −0.35±0.35 D (95%CI, -1.05 to 0.34 D) | 0.41 |
| LogMAR UDVA | −0.20±0.11 (95%CI, 0.03 to 0.42) | −0.20±0.08 (95%CI, -0.03 to -0.36) | 0.17 |
| LogMAR CDVA | −0.26±0.06 (95%CI, -0.14 to -0.38) | −0.27±0.06 (95%CI, -0.16 to -0.38) | 0.75 |
ICL = implantable collamer lens, CI = confidence interval, D = diopters, LogMAR = logarithm of the minimal angle of resolution, UDVA = uncorrected distance visual acuity, CDVA = corrected distance visual acuity.