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Fig. 1 | Eye and Vision

Fig. 1

From: Central corneal regularization (CCR): an alternative approach in keratoconus treatment

Fig. 1

Higher order corneal morphological aberrations (HOCMAs) calculation. HOCMAs – Morphological substrate for the anterior corneal surface optical aberrations above the second order, calculated with respect to the best fit toric surface within a predefined diameter. The HOCMAs of the anterior corneal surface are calculated as the difference between the positive index of irregularity of the anterior corneal surface (Ia+) and the negative index of irregularity of the anterior corneal surface (Ia-), which are respectively the maximum and the minimum difference between the anterior corneal surface and the best fit toric surface calculated within the predefined domain (D)

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