System for evaluating and correcting irregular astigmatism in the eye of a patient

摘要

An apparatus for treating the eye of a patient having irregular astigmatism in which the astigmatism is measured in two hemidivisions of the eye and operational parameters are determined which would produce minimum astigmatism when measured refractively and topographically in each hemidivision. The operational parameters are combined to obtain surgical treatment parameters by which astigmatism remaining in the eye will be symmetrical and orthogonal. the surgical parameters are determined in a single stop by a computer program which receives the measured astigmatism as input values.