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Filippo Maria Maria Amore, Valeria Silvestri, Marco Sulfaro, Margherita Guidobaldi, Francesca De Rossi; Preliminary evaluation of MP-3 rehabilitation tool. Invest. Ophthalmol. Vis. Sci. 2017;58(8):4703.
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The Nidek MP-3 microperimeter incorporates automatic features as retina alignment and position check. Moreover, MP-3 is going to be implemented with a biofeedback tool characterized by customizable tunes as acoustic signals. The aim of this preliminary evaluation was to compare the biofeedback (BFB) stimulation tool of MP-1 with that of MP-3 with regard to the ratio between the tracked time and the elapsed time as an efficiency indicator.
A total of 5 patients with central scotoma and instability of fixation referred to National Centre of Services and Research for the Prevention of Blindness and Rehabilitation of Low Vision Patients were included in the observational study. The whole sample attended the structured stimulus BFB both at MP-1 and at MP-3. Patients underwent two consecutive BFB stimulation sessions during the two weeks in which MP-3 prototype was used. In this prospective observational study the BFB elapsed time, indicating the total duration of the session, and the tracked time, indicating the continuous stimulation duration, were examined for the two microperimeters. These data were automatically provided by the MP-1 and MP-3 software.
Nine eyes of five patients were tested. In MP-1 the mean value of the elapsed time was 11.1±1.2 minutes while in MP-3 it was 9.5±2.3 minutes. The mean value of tracked time was 9.9±0.7 minutes in MP-1 while 8.6±2.1 minutes in MP-3. The efficiency index (i.e. the ratio between tracked and elapsed time) was 90%±9% for MP-1 and 91%±5% for MP-3.4.
MP-3 automatic features seem to be valid tools to control ocular movements in order to continuously verify the retinal alignment and fixation behavior. From these preliminary data, it seems that there is not significant difference between the efficiency indexes of the two microperimeters. Moreover, patients reported to appreciate the customizable acoustic tunes. More data is under collection to overcome the limit of the current dataset and provide statistical significant results.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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