What is tonometry?
Tonometry is a method for an indirect measurement of the intraocular pressure, namely measurement of the deformation ability of the eyeball.
When does tonometry take place?
Primary tonometry is made for diagnosis of glaucoma (an eye disease accompanied by increased intraocular pressure) and in many other diseases, accompanied by an increase or decrease in intraocular pressure (retinal detachment, etc.).
How is tonometry conducted?
There are two main methods: Contactless (ie. Air) - in which the patient's eye stays untouched; and Contact - after inserting the drip anesthesia to the anterior surface, the pressure is measured by a touch with a fine instrument.
The instrumental study provides accurate information about pressure:
Impression tonometry (founded on basis of pressure on the anterior surface towards the center of the eyeball); Applanatsionna tonometry (measures the ability of the eye to flatten in contact with the surface of the tonometer, while the footprint (tonograma) is analyzed).