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Estimating the Position of Simulated Phosphenes Usinga Tactile Guide

机译：使用触觉指南估算模拟的磷的位置

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摘要

A visual prosthesis provides usable visual information to the patient in the form of phosphenes, that is, punctate photic sensations seen after electrical stimulation. Stimulation via different electrodes results in phosphenes in different positions within the visual field. Simulation studies can provide data on the possible limitations of prosthetic stimulation. We used a head mounted screen to monocularly present constant or flickering light spots of different sizes, or luminance to normally sighted subjects. Subjects were asked to judge the location of the spots using a polar coordinate tactile guide; positioning average error and dispersion were analyzed. With the increase of eccentricity, the positioning average error and dispersion were also increased. The performances under large, stable and high luminance conditions were better than that under small, flickering and low luminance conditions, respectively. Repeated training sessions were shown to significantly improve the positioning performance.
机译：视觉假体以的形式为患者提供可用的视觉信息，即电刺激后看到的点状光感。经由不同电极的刺激导致磷光体在视野内的不同位置。仿真研究可以提供有关假体刺激可能限制的数据。我们使用头戴式屏幕来单眼呈现出恒定大小或闪烁的不同大小的光斑，或向正常视线的对象显示亮度。要求受试者使用极坐标触觉向导判断斑点的位置。分析了定位平均误差和色散。随着偏心率的增加，定位平均误差和色散也增加。在大，稳定和高亮度条件下的性能分别优于在小，闪烁和低亮度条件下的性能。重复的训练显示可以显着提高定位性能。

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