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Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment
Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment
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机译:评估半子午线地形参数以进行角膜散光和矢量计划治疗
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摘要
Techniques are disclosed in which a topographic parameter is determined in each hemidivision of the eye by considering the topography of reflected images from a multiplicity of illuminated concentric rings of the cornea. A simulated spherocylinder is produced to fit into each ring and conform to the topography thereof from which a topographic parameter for each ring can be obtained. All of the topographic parameters of each ring are combined and a mean summated value is obtained representing magnitude and meridian of each hemidivision. From these parameters, a single topographic value for the entire eye (CorT) can be found as well as a value representing topographic disparity (TD) between the two hemidivisions. The topography values for the hemidivisions are used in a vector planning system to obtain treatment parameters in a single step operation.
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