Feasibility of a Self-administered, Computer Guided, Visual Perception Training Software for the Argus II Retinal Prosthesis.

Abstract

Purpose : Improving patient outcome and proficient use of the Argus II retinal prosthesis may be achieved by incorporating consistent training in the home setting. Self-administered, computerized, visual rehabilitation training modules may help patients learn how to interpret the new visual input they perceive from their device. This study investigates the benefits of training with a computer- based, interactive software designed to improve on-screen object recognition, spatial tracking, and eye-hand coordination.

Methods : Computer-based training modules were programmed using National Instruments Labview Development Suite (Austin, TX.). The patient is emailed a web link allowing the download and installation of each module. At the completion of each module data measuring accuracy and timing are programmatically transmitted back for analysis via secure email. The object recognition module presents the patient with random characters and symbols for identification. The user can adjust the size, brightness and position of the object to improve visualization. The spatial tracking module presents an on-screen object that moves in a pattern (i.e. square, vertical figure eight, triangle, spiral, horizontal figure eight, heart, horizontal zig-zag, circle). The patient tracks and identifies the pattern of the animation. During the initial phase of the eye-hand coordination module, the patient becomes familiar with using the computer mouse to move an enlarged on-screen cursor. In the second phase the patient is presented with on-screen targets to click on with the cursor.

Results : Consistent use of the training modules showed significant improvements in accuracy and completion time. Target localization accuracy improved 85.5% after 3 trials, character recognition improved 50% accuracy after 7 trials and pattern tracking improved 33% after 5 trials. Performance accuracy decreased 51.9% when the Argus II device was not used.

Conclusions : Incorporating interactive, computer based training at patient’s home can improve interpretation of the visual precepts delivered by the Argus II retinal prosthesis.

This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.

 

Self-administered, Computer Guided, Visual Perception Training Software