Table 1 Median and 95% confidence interval of pre-operative (distance measurement only) and post-operative refractive errors and visual acuity at distance (20 ft), intermediate (60 cm) and near (40 cm) accommodation of the 3 groups: Emmetropes (n = 50); SILK (n = 69) and LASIK (n = 95).
Emmetropes | SILK | LASIK | p-value* | |
|---|---|---|---|---|
Spherical error (D) | ||||
Preop | – | − 3.25[− 3.75, − 2.75] | − 4.5 [− 4.75, − 3.75] | < 0.01# |
Distance | 0.12 [0.07, 0.25] | 0 [0, 0.12] | − 0.25[− 0.37, − 0.12] | < 0.01# |
Intermediate | − 1 [− 1.12, − 1] | − 0.87 [− 1, − 0.87] | − 1 [− 1, − 0.87] | > 0.05 |
Near | − 1.87 [− 2, − 1.75] | − 1.62[− 1.75, − 1.62] | − 1.62[− 1.75, − 1.56] | < 0.01# |
Cylindrical error (D) | ||||
Preop | – | − 0.5 [− 0.75, − 0.5] | − 0.75 [− 1, − 0.5] | 0.16 |
Distance | − 0.44[− 0.62, − 0.37] | − 0.62[− 0.75, − 0.5] | − 0.37[− 0.5, − 0.37] | < 0.01# |
Intermediate | − 0.5 [− 0.5, − 0.37] | − 0.75[− 0.75, − 0.62] | − 0.37[− 0.5, − 0.37] | < 0.01# |
Near | − 0.5 [− 0.62, − 0.32] | − 0.62 [− 0.75, − 0.5] | − 0.37 [− 0.5, − 0.37] | < 0.01# |
Visual acuity (LogMAR) | ||||
Preop CDVA | – | 0 [0,0] | 0 [0,0] | 0.14 |
Distance** | 0.1 [0, 0.1] | 0 [0, 0] | 0 [0, 0] | < 0.01# |
Intermediate** | − 0.08[− 0.08, − 0.08] | − 0.08 [− 0.08, 0.02] | 0.02 [0.02, 0.02] | < 0.001# |
Near** | 0 [0, 0] | 0 [0, 0.01] | 0 [0, 0] | < 0.01# |
