Keratometry
New Indices for Keratometry: KAI, KRI
The Corneal Irregular Astigmatism display function is installed to expand the possibility of Keratometer. This is the new function to measure the level of Corneal Irregular Astigmatism, which was difficult in the past.
The Indices of KAI and KRI that show the Corneal Irregular Astigmatism are displayed with its three levels (A/B/C) at Keratometry
KAI: (Kerato-Asymmetry Index)
The Index indicating the asymmetry of cornea. This index becomes larger when the corneal shape is asymmetric.
KRI: (Kerato-Regularity Index)
The Index indicating the regularity of the cornea (higher-order irregular astigmatism). This index becomes larger when the corneal surface is not smooth.
It is possible to confirm the detail of the corneal shape with Topographer by switching to the Topography Mode with out only "ONE TOUCH" if irregular astigmatism is suspected with KAI and KRI.
Fourier analysis of TMS separates and quantifies the refracting power on the surface of the cornea to “Spherical”, “Regular Astigmatism”, “Asymmetry” and “Higherorder irregularity” show the Corneal Irregular Astigmatism.
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