Development of Prototype to Measure Intraocular Pressure of Eye Along with Gonioscopy

Tonometry, a procedure of glaucoma investigation is carried out effectively in all eye care clinics. The other testing method namely gonioscopy requires professional expertise and experience due to which optometrists/ophthalmologists avoid this test. Hence the proposed technology would let these two important glaucoma testing procedures be performed simultaneously with a common instrument 'Tonogoniometry' and making detection easier, time-saving, and lowering uneasiness to the patient. Tonometry is implemented by embedding a vibration sensor on the 3-mirror goniolens. The experiment is performed on goat eyes and the data collected is statistically analyzed. The relation between the Intraocular pressure (IOP) of the eye and the sensor output is derived and is implemented in LabVIEW. During tonometry, the sensor output captured by the NI data acquisition card is fed to the LabVIEW platform which will display the evaluated IOP of the eye on the computer screen. Meanwhile, there is no obstruction to the light path through the goniolens to visualize the anterior chamber angle to perform gonioscopy. The experimental results epitomized that the rise in IOP of the eye will increase the intensity of vibration of the sensor and the sensor output will have a higher magnitude.