Table 3 Correlation coefficients matrix of biometric parameters in the two groups.

Parameter	AL (mm)	K1 (D)	K2 (D)	K (D)	CD (mm)	ACD (mm)	CA (D)	AL/CR	ACD/AL
High myopia group
K1^a	0.042*	‒	‒	‒	‒	‒	‒	‒	‒
K2^a	0.069**	0.883***	‒	‒	‒	‒	‒	‒	‒
K^a	0.056**	0.968***	0.973***	‒	‒	‒	‒	‒	‒
CD^a	−0.046*	−0.449***	−0.477***	−0.478***	‒	‒	‒	‒	‒
ACD^a	−0.080***	0.008	−0.013	−0.003	0.258***	‒	‒	‒	‒
CA^b	0.082***	−0.055*	0.370***	0.170***	−0.135***	−0.035	‒	‒	‒
AL/ CR^b	0.909***	0.407***	0.432***	0.431***	−0.227***	−0.073**	0.143***	‒	‒
ACD/AL^a	−0.603***	−0.011	−0.039	−0.026	0.215***	0.821***	−0.071**	−0.554***	‒
Non-high myopia group
K1^a	−0.548***	‒	‒	‒	‒	‒	‒	‒	‒
K2^a	−0.528***	0.889***	‒	‒	‒	‒	‒	‒	‒
K^a	−0.553***	0.971***	0.972***	‒	‒	‒	‒	‒	‒
CD^a	0.363***	−0.369***	−0.416***	−0.404***	‒	‒	‒	‒	‒
ACD^a	0.379***	0.039***	0.001	0.020*	0.258***	‒	‒	‒	‒
CA^b	0.019*	−0.172***	0.229***	0.032***	−0.112***	−0.089***	‒	‒	‒
AL/ CR^a	0.428***	0.319***	0.509***	0.515***	−0.065***	0.411***	0.040***	‒	‒
ACD/ AL^a	0.160***	0.170***	0.127***	0.153***	0.184***	0.959***	−0.070***	0.329***	‒

AL axial length, K keratometry, K1 flat keratometry, K2 steep keratometry, CD corneal diameter, ACD anterior chamber depth, CA corneal astigmatism, CR corneal radius of curvature.
^aPearson‒related coefficient; ^bSpearman‒related coefficient. *P < 0.05; **P < 0.01; ***P < 0.001.

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