ANSI Z80.23-2018

ABSI Z80.23-2018 applies to instruments, systems and methods that are intendedto measure the shape of the cornea of the human eye over a majority of its area. The measurementsof the anterior and/or posterior surface in local areas may be of curvature and/or three dimensionaltopographical measurements of the surface. The measurements may be used to derivemore global parameters used to characterize the surfaces. Instruments classified as ophthalmometersor keratometers are not covered by this standard.