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The cumulative corneal axial and lateral displacements (cCAD and cCLD) and the corresponding speckle tracking correlation coefficient (Corr.) in one subject showing the effects of microsaccades (short, solid arrows) and drifts (dashed arrows). Speckle tracking correlation coefficients remained very high (close to 1.0) except at time points of microsaccades that affected both axial and lateral displacements. Drifts did not affect correlation coefficients.
