Corneal curvature k1 and k2 values and the difference between the two should be looked at.
Corneal curvature is an expression of the curvature of the cornea, and while a normal cornea is rarely very regular and rounded, the k1 value expresses the curvature of the cornea in a relatively flat area, while the k2 value expresses the curvature of the cornea in a relatively steep area.
The mean value of corneal curvature ranges from 39D to 45D. The difference between k1 and k2 represents the amount of astigmatism in the cornea, and if the difference between the two is not significant, then any value within this range of the mean is considered normal;
If the difference between k1 and k2 is large, it is necessary to consider whether the astigmatism on the cornea needs to be corrected or not, and if necessary, further examination should be done to discharge the possibility of cone cornea.
Thus, corneal curvature k1, k2 and the difference between the two should be considered comprehensively.