The original Goldmann tonometer AT900Goldmann applanation tonometer is still the most widely used instrument to measure the intraocular pressure. It is based on the Goldmann principle – a principle proven over more than 50 years and with millions of patients. The positive experience of many thousands of tonometer users highlights the trustworthiness of your measurement results. Goldmann applanation tonometry is fast and reproducible. The HaagStreit high precision manufacture guarantees continuous, reliable performance and ensures many years of usage without the necessity of manufacturer maintenance.