1. Non-contact optical tonometer TOPCON CT-60 – user guide. [document]. Copyright SURVEYE, s. r. o., 2017.
2. Chudy, V., Palencar, R., Kurekova, E., Halaj, M., Measurement of technical quantities, Publisher Bratislava: STU, 1999. p. 688 (in Slovak).
3. Hornova, J., Baxant, A., Contemporary possibilities of intraocular pressure measurement, [online]. 2012, Copyright 2008-2018 MeDitorial.
4. at: http://www.prolekare.cz/ceska-slovenska-oftalmologie-clanek/soucasne-moznosti-mereni-nitroocniho-tlaku-47139 (in Czech)
5. Kirstein, E.M., Elsheikh, A., Gunvant, P., Tonometry – Past, Present and Future, Intechopen [online]. 2011,