Authors: Radek Girgle, Igor Vicha, Eva Vlkova, Jiri Rozman, Martin Cizek, Jiri Dlouhy, Brno, Czech Republic


A new electronic system helping the patients to keep their heads in optimal position after vitrectomy with gas was presented at the Eighth EVRS congress in Prague. Our team of ophthalmologists and bioengineers presents the progress in the development of this system during the last year. A head mounted device continually monitors the head position and immediately warns the patient whenever the position of his head is not within the ideal range set by the clinician. Position data is stored in regular intervals into the flash memory; each non-ideal head position occurrence is also saved.


Head position is described by the means of angle of tilt in all axes. As a sensing element a 3D accelerometer is utilized. Computer software for data acquisition and analysis is also a part of the system. During the postoperative examinations the position data can be downloaded to the host computer at the clinic, further analyzed and confronted with the actual therapy results.

Effectiveness / Safety:

The proposed solution will improve the results of vitreoretinal surgery procedures. The designed system is in fact an application of the Holter monitoring, biofeedback and biotelemetry.

Supported by the Czech Science Foundation: project No. 102/08/1373.