Relationship between Crystalline Lens Thickness and Shape and the Identification of Anterior Ocular Segment Parameters for Predicting the Intraocular Lens Position after Cataract Surgery
Table 1
Demographic data and mean ocular biometric parameters.
Parameter
Mean ± SD (range)
Eyes (n)
79
Patients (n)
79
Age (years)
69 ± 11 (26–86)
Females, n (%)
50 (65.8%)
Implanted IOL
AQ110NV
IOL power (D)
19.4 ± 3.53 (10.0–25.5)
Axial length (mm)
24.60 ± 1.51 (21.74–28.47)
Predictive refraction by SRK/T for after surgery (D)
-1.51 ± 0.84 (-3.10–-0.30)
Spherical equivalent value of postoperative refraction (D)
-1.51 ± 1.03 (-3.38–0.38)
Prediction error (D)
0.00 ± 0.45 (-1.00–1.01)
Predicted postoperative ACD of SRK/T formula (mm)
5.68 ± 0.41 (4.86–6.98)
C constant
0.39 ± 0.04 (0.30–0.52)
Predicted IOL position using C constant (mm)
4.54 ± 0.30 (3.87–5.46)
Preoperative crystalline lens parameters
Anterior curvature radius (mm)
10.21 ± 1.32 (7.73–13.97)
Posterior curvature radius (mm)
6.01 ± 0.53 (4.72–7.67)
Lens thickness (mm)
4.48 ± 0.37 (3.64–5.40)
Anterior surface depth (mm)
2.79 ± 0.38 (1.75–3.80)
Equatorial surface depth (mm)
4.24 ± 0.32 (3.65–4.91)
Posterior surface depth (mm)
7.27 ± 0.32 (6.60–8.04)
Postoperative IOL depth parameters
Anterior IOL surface position (mm)
4.04 ± 0.28 (3.42–4.87)
Central IOL thickness position (mm)
4.55 ± 0.25 (3.97–5.28)
Posterior IOL surface position (mm)
5.06 ± 0.22 (4.51–5.69)
SD: standard deviation; IOL: intraocular lens; ACD: anterior chamber depth.
