The development of the study on the expression of corneal asphericity

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. Key words: Cornea; Asphericity; Tangential radius; Q-value