Table 1.
Distribution of the ocular biometric parameters by age group
| Parameter | Total | Age group (years) | ||||
|---|---|---|---|---|---|---|
| 40–49 | 50–59 | 60–69 | 70–79 | 80+ | ||
| n (%) | 28,709 | 1932 (6.7 %) | 3658 (12.7 %) | 8720 (30.4 %) | 9888 (34.4 %) | 4511 (15.7 %) |
| AL (mm) | 24.17 ± 2.47 | 26.63 ± 3.40 | 24.98 ± 3.20 | 24.03 ± 2.39 | 23.75 ± 1.93 | 23.66 ± 1.58 |
| Km (D) | 44.26 ± 1.70 | 43.72 ± 2.17 | 44.08 ± 1.81 | 44.30 ± 1.61 | 44.38 ± 1.63 | 44.32 ± 1.59 |
| CA (D) | 1.06 ± 0.96 | 1.14 ± 0.93 | 1.01 ± 0.94 | 0.94 ± 0.88 | 1.08 ± 0.99 | 1.26 ± 1.04 |
| ACD (mm) | 3.02 ± 0.45 | 3.38 ± 0.41 | 3.21 ± 0.43 | 3.03 ± 0.44 | 2.95 ± 0.44 | 2.88 ± 0.41 |
| LT (mm) | 4.52 ± 0.45 | 4.17 ± 0.38 | 4.32 ± 0.43 | 4.50 ± 0.44 | 4.60 ± 0.43 | 4.70 ± 0.43 |
| CCT (mm) | 0.534 ± 0.04 | 0.533 ± 0.04 | 0.537 ± 0.04 | 0.534 ± 0.03 | 0.533 ± 0.04 | 0.533 ± 0.03 |
| WTW (mm) | 11.64 ± 0.46 | 11.83 ± 0.49 | 11.74 ± 0.46 | 11.63 ± 0.45 | 11.58 ± 0.45 | 11.60 ± 0.44 |
AL axial length; Km mean keratometry; CA corneal astigmatism; ACD anterior chamber depth; LT lens thickness; CCT central corneal thickness; WTW white to white