What is it?
What exactly is keratometry?
Keratometry is a procedure used to measure the curvature of the cornea (corneal curvature). It is performed by an ophthalmologist, with the aid of a device known as keratometer. No special preparation is required, on the part of the patient. As a process is characterized painless and significantly facilitates the patient to cooperate.
One of the main reasons for carrying out the examination of keratometry is the control of the corneal astigmatism (a refractive error caused by abnormalities in the shape and curvature of the cornea). Also, the degree of astigmatism is easily determined. Also, very useful conclusions come out, for keratoconus cases but for all refractive patients as well. Keratometry is connected with the choice of the refractive technique and not only, before refractive surgery with excimer laser.
How exactly is the process of keratometry performed?
The patient sits in front of a special machine called keratometer. Keeping the eyes open for a few seconds, a series of measurements of the degree of curvature of the cornea (keratometry control values) is made. Most modern keratometric analysts use optical sensors and, based on special software, they are able to compare the cornea of the patient with a given value database (standards – templates).
Ultimately, the numbers are recorded and useful conclusions come out, regarding the cornea.