Correlation between the standard deviations of biometric measures derived from the sequence of 3 repeat measurements.

The upper right triangular matrix displays the Spearman rank correlation coefficient, and on the lower left triangular matrix lists the respective significance levels. AL, ACD, AQD, LT, CCT, CD, PUP, CW, PKeq, PPeq, and PTeq refer to the standard deviations of the axial length, anterior chamber depth measured from the corneal epithelium to the lens front apex, aqueous depth measured from the corneal endothelium to the lens front apex, thickness of the crystalline lens, central corneal thickness, horizontal corneal diameter, Pupil diameter, Chang-Waring chord, keratometric equivalent power, equivalent power of the corneal back surface, and equivalent power of total keratometry TL. Statistically significant correlations with a significance level less than 0.05 are marked in bold.