Summary of ocular biometry
| Measurement | Ultrasound | Optical/ultrasound | |||||
|---|---|---|---|---|---|---|---|
| Data set | (1) | (2) | (3) | (1) | (2) | (3) | |
| Axial length (mm) | 23.26 (0.97) | 24.04 (1.58) | 23.39 (1.32) | 23.51 (0.97) | 24.39 (1.62) | 23.7 (1.26) | |
| Anterior chamber depth (mm) | 3.10 (0.38) | 2.81 (0.40) | 2.60 (0.56) | 3.35 (0.38) | 3.16 (0.41)† | 3.03 (0.45)‡ | |
| Lens thickness (mm) | 4.44 (0.45) | 4.85 (0.41) | 5.01 (0.49) | — | — | — | |
| Keratometry (mm) | 7.77 (0.24) | 7.73 (0.25) | 7.61 ( 0.26) | — | — | — | |
| Refraction (D) | −0.01 (2.13) | −0.15 (1.58) | −0.82 (2.05) | — | — | — | |
| Equivalent power of cornea (D) | 42.7 (1.3) | 42.9 (1.4) | 43.6 (1.51) | — | — | — | |
| Equivalent power of lens (D) | 25.0 (2.1) | 21.7 (2.7) | 24.3 (3.0) | 24.4 (2.1) | 21.0 (3.0) | 23.5 (3.0) | |
| Equivalent power of eye (D) | 63.1 (2.2) | 60.6 (2.9) | 63.5 (3.2) | 62.4 (2.2) | 59.8 (3.0) | 62.5 (3.1) | |
Numbers in parentheses are the standard deviation.
↵Ultrasonic ACD plus 0.25 mm; †optical ACD plus 0.55 mm (corneal thickness); ‡optical ACD plus optical corneal thickness.