Table 2.
Comparison of baseline parameters between the central (3 mm) and paracentral (>3 mm) cones.
| Parameter | Central (n = 268) | Paracentral (n = 46) | ap value |
|---|---|---|---|
| Age (years) | 26.6 ± 7.1 | 32.4 ± 9.2 | <0.001 |
| Male (%) | 69.4% | 76.1% | 0.36 |
| Eye (% right) | 42.9% | 37.0% | 0.45 |
| Caucasian (%) | 43.3% | 54.4% | 0.16 |
| Allergies (%) | 38.1% | 37.0% | 0.89 |
| Amsler–Krumeich grading | 0.98 | ||
| Grade 1 | 79% | 80% | |
| Grade 2 | 8% | 9% | |
| Grade 3 | 3% | 2% | |
| Grade 4 | 10% | 9% | |
| SEQ (D) | −3.52 ± 3.89 | −3.27 ± 4.50 | 0.72 |
| Astigmatism (D) | 2.97 ± 1.93 | 3.50 ± 2.00 | 0.10 |
| BSCVA (logMAR) | 0.26 ± 0.23 | 0.29 ± 0.25 | 0.50 |
| CCT (μ) | 489.0 ± 47.0 | 485.4 ± 48.7 | 0.65 |
| MCT (μ) | 472.2 ± 45.1 | 457.3 ± 49.4 | 0.06 |
| Corneal astigmatism (D) | 3.31 ± 1.96 | 4.01 ± 1.90 | 0.03 |
| Kmax (D) | 55.90 ± 8.27 | 56.96 ± 9.45 | 0.48 |
| Coma (μ) | 2.88 ± 1.75 | 3.63 ± 1.85 | 0.02 |
SEQ spherical equivalent, BSCVA best spectacle-corrected visual acuity, CCT central corneal thickness, MCT minimal corneal thickness, Kmax maximum keratometry.
aStudent’s t test and chi-square.