MEDICAL EYE CENTRE
ST.NIKOLAY CHUDOTVORETS
phone: +359 52 630 670 
mobile phone: +352 878 630 954
Varna, 9000, 12,"Nikulitsel" Str. 
Non-contact Tonometry
It is the determination of intraocular pressure without direct contact with the patient's cornea, but through an air pulse. Perkins, Tonopen: new state-of-the-art tonometers for screening of intraocular pressure. SCHIOTZ : a contact method for measurement of intraocular pressure after instilment of anaesthetic eye drops.