What you need to know about Used S4Optik Hand Held Cross Cylinder
Keratometer, known as an ophthalmometer, is an analytic instrument that is used for measuring the bend of the anterior surface of the cornea to charge the degree and axis of astigmatism. There are many Keratometer manufacturers in the market, out of which only a few provide quality test results.
S4Optik Hand Held Cross Cylinder is used for Keratometry purposes, which is a technique used to measure the curvature of the cornea. Moreover, it works by reflecting an image off of two points in the cornea and uses the relationship between object size, the size of the image reflected, and the distance between the object and the Keratometer which are more common and can adjust the size of the image.