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An algorithm to recalculate topographic maps from any axis for computer assisted videokeratography (Articolo in inglese)

A problem that has been frequently attribuited to CAVKs is that curvature maps have always referred to the vertex as normal: a center that has no physiological meaning and, usually, has no relation with the pupil entrance and the line of sight, nor with the corneal apex. Another limit of both paraxial and instantaneous curvatures is their dependence from the reference axis through the vertex (and thus maps do not show all of the infinitive curves that are present at any point).