Argus II allows letters and short words identification: A new visual re-educational protocol. Case report

Session Details

Session Title: Free Paper Session 8: Vitreoretinal Surgery III

Session Date/Time: Friday 08/09/2017 | 08:00-09:30

Paper Time: 08:54

Venue: Room 111

First Author: : F.Patelli ITALY

Co Author(s): :    L. Colombo   T. Nuzzo   G. Savaresi   P. Ferri   L. Rossetti                 

Abstract Details

Purpose:

to describe the results obtained by a patient implanted with Argus II device using a new visual re-educational protocol

Setting:

university hospital

Methods:

Argus II device is implanted in a patient affected by Retinitis Pigmentosa. Visual Acuity (VA) before implant was no light perception (NLP). A new re-educational protocol in used for visual rehabilitation. Visual training is divided in two steps: A) hand-eye coordination B) letters/words identification. A) A black board with white strip magnets is used to teach the patient the correct head scan movements using hands for strip identification. B) A 24” high definition screen is used for letter identification. Alphabet letters were divided into groups according to their shape (straight, oblique, round lines or mixed shape) and presented randomly. Patient is trained 2 hours per day for one month with the black board and the following period 2 hours per day for letters identification. Number of attempts to correctly identify single letters and 4-letter words and time spent on the recognition were evaluated 45 and 90 days after surgery.

Results:

fortyfive days after surgery the patient was able to correctly identify 68% and 16% of the presented letters and words at the first attempt respectively. The mean time spent for single letters identification was 105 ± 65 sec and for 4-letter words was 286 ± 118 sec. 90 days after surgery he was able to correctly identify 92% and 72% of the presented letters and words at the first attempt respectively. The mean time spent for single letters identification was 5 ± 2.5 sec and for 4-letter words was 19.5 ± 6 sec.

Conclusions:

in this patient we show that Argus II allows blind people affected by retinitis pigmentosa to identify letters and short words. The re-educational program is as important as surgery and a re-educational protocol should be standardized to get the best outcome of the device that has great potential translating into helping people in facing daily activities more independently

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