Fig. 6
From: Corneal functional optical zone under monocular and binocular assessment
Correlation between the binocular estimated defocus power (Spherical equivalent) to the monocular estimated defocus power and the intercorneal difference in defocus power. Notice the excellent agreement between Binocular and Monocular estimated values showing positive correlation (even/direct symmetry) compared to the non-significant (P = 0.7) negative correlation between the Binocular estimated values and the Intercorneal differences (odd/mirrored symmetry)