Mulak , Małgorzata, and Dorota Szumny. “Modern Tonometry – More Than Pressure Measurement”. OphthaTherapy. Therapies in Ophthalmology 3, no. 4 (December 30, 2016): 250-253. Accessed May 18, 2024. https://journalsmededu.pl/index.php/ophthatherapy/article/view/634.