11/04/2014

Ryazan State Instrument-Making Enterprise

Innovative method of intraocular pressure measurement - through the eyelid and over the sclera.

The problem of irreversible blindness due to the late diagnostics of glaucoma has already crossed the border of a purely medical problem and acquired medico-social character. It is not a secret that the growth of disability among population entails an additional burden on the state budget in the form of social welfare benefits, and, at the same time, reduces the amount of able-bodied population.
Is there any easy and accessible way to control IOP even at home like the procedure of blood pressure measurement? The portable ophthalmic tonometer manufactured by Ryazan State Instrument-making enterprise under the trademark diaton is easy-to-use, it has no direct contact to the cornea - it only touches the skin of the upper lid while IOP measuring procedure. Application safety of the tool can be compared with the instillation of eye drops. The absence of the direct contact with the eyeball eliminates the risk of infecting during the procedure.


The detailed operation manual and descriptive video film included into the device set allow mastering the measuring through the eyelid technique either by a doctor or by his assistant.


The proposed device for non-invasive, safe, comfortable for a patient and convenient for a physician ophthalmic tonometry procedure presents itself a portable tool having functional parts - tip , rod, single operation button, display, battery compartment and built-in microprocessor.
To achieve high accuracy in the measurements the tonometry technique must be strictly followed.
IOP measuring is possible with the patient sitting or lying, the main requirement here is the horizontal position of the patient's head. The tip of the indicator is placed at the edge of the upper eyelid fixing patient's sight at 45 ° angle, so that the rod has its impact on the sclera. The exact position of the device on the eyelid is especially important in getting the most accurate result because of the different thickness of the palpebral cartilage on one side length and the sclera thickness in the rod's impact area on the other side.
The sound sensor implemented in the diaton tonometer helps to maintain the vertical position of the device when measuring, and in the case of the deviation of the device it gives a sound signal.
Having done a series of measurements the average intraocular pressure value calculated by the microprocessor appears on the display of the device. The device determines the number of measurements automatically by means of the algorithm that specifies permissible variation in the values.


The ophthalmic tonometer diaton allows to carry out the primary IOP screening as well as 24-hour IOP monitoring with no loss of information content the value of which is undisputable while analyzing the pathology’s advance and selecting the best treatment strategy in the course of clinical supervision. Having a detailed report of the patient’s 24-hour ophthalmotonus the ophthalmologist will be able to see the full clinical picture and take into account the patient’s personal peculiarities in order to pick up the unique scheme of glaucoma treatment.