Corneal asphericity has been a topic in clinical ophthalmology. This article discusses a corneal surface model based on corneal topography height data， as well as the Q value calculated by tangential data and axial data. The method of using the tangential data， which can be used to calculate the Q-values of all the semi-meridians by coordinate circumrotation， solved the problem of the accuracy and positioning of calculated Q-value. Related firdings support the accuracy and stability of this method.
施明光,王若洁. 角膜表面非球面形态数字表达研究的沿革[J]. 中华眼视光学与视觉科学杂志, 2013, 15(3): 129-130.
SHI Ming-guang,WANG Ruo-jie. The development of the study on the expression of corneal asphericity. Chinese Journal of Optometry Ophthalmology and Visual Science, 2013, 15(3): 129-130. DOI: 10.3760/cma.j.issn.1674-845X.2013.07.001
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