Diaton tonometer is the only one device for intraocular pressure measuring through the upper eyelid. It completely meets modern diagnostic equipment requirements. Currently, transpalpebral scleral tonometry has no alternative and is the most optimum method when carrying out prophylactic medical examination of the population and in complicated clinical cases when the use of classical tonometry methods is impossible. Innovative approach to IOP measurement opens up wide clinical possibilities and unquestionable advantages to the doctor and to the patient.