keratometry การใช้

Keratometry is especially important in the fitting of rigid lenses.
This is due to an increase in the refractive power of the keratometry readings do not reveal a corneal or length basis for a myopic shift . It is usually reversible with time.
People that are considered for treatment must undergo an extensive clinical workup, including corneal tomography, computerized corneal topography, endothelial microscopy, ultrasound pachymetry, b-scan sonography, keratometry and biomicroscopy.
A development of keratoscopy, corneal topography extends the measurement range from the four points a few millimeters apart that is offered by keratometry to a grid of thousands of points covering the entire cornea.
The constant is a theoretical value that relates the lens power to AL and keratometry, it is not expressed in units and is specific to the design of the IOL and its intended location and orientation within the eye.