Research Article

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 2

Correlations and determination coefficients of the ocular biometric parameters.

VariableCorrelation and determination coefficients (partial correlation coefficients) with crystalline lens thicknessp value

Ager = 0.53, R2 = 0.28<0.001
Anterior curvature radius for crystalline lensr = -0.60, R2 = 0.36 (r = -0.57)<0.001
Posterior curvature radius for crystalline lensr = -0.12, R2 = 0.01 (r = -0.14)1.000
Anterior surface depth for crystalline lensr = -0.65, R2 = 0.42 (r = -0.61)<0.001
Equatorial surface depth for crystalline lensr = -0.18, R2 = 0.03 (r = -0.17)1.000
Posterior surface depth for crystalline lensr = 0.41, R2 = 0.17 (r = 0.32)0.002
Central IOL thickness positionr = 0.01, R2 = 0.00 (r = 0.02)1.000
C constantr = 0.55, R2 = 0.30 (r = 0.54)<0.001
Predicted IOL position using C constantr = -0.32, R2 = 0.10 (r = -0.32)0.033
Correlation and determination coefficients with predicted IOL position using C constant
Anterior surface depth for crystalline lensr = 0.93, R2 = 0.86<0.001
Equatorial surface depth for crystalline lensr = 0.80, R2 = 0.64<0.001
Posterior surface depth for crystalline lensr = 0.73, R2 = 0.53<0.001
Correlation and determination coefficients with anterior IOL surface position
Anterior surface depth for crystalline lensr = 0.67, R2 = 0.45<0.001
Equatorial surface depth for crystalline lensr = 0.72, R2 = 0.52<0.001
Posterior surface depth for crystalline lensr = 0.74, R2 = 0.55<0.001
Correlation and determination coefficients with predictive refraction error
Difference between predicted postoperative ACD of SRK/T formula and anterior IOL surface positionr = 0.65, R2 = 0.42<0.001
Difference between predicted postoperative ACD of SRK/T formula and anterior surface depth for crystalline lensr = 0.46, R2 = 0.21<0.001
Difference between predicted postoperative ACD of SRK/T formula and equatorial surface depth for crystalline lensr = 0.54, R2 = 0.29<0.001
Difference between predicted postoperative ACD of SRK/T formula and posterior surface depth for crystalline lensr = 0.58, R2 = 0.34<0.001

IOL: intraocular lens; ACD: anterior chamber depth.