Position, size and luminosity of phosphenes generated by direct optic nerve stimulation.

Abstract:

:Pulses of low intensity current, delivered through a cuff electrode chronically implanted around the optic nerve of a blind retinitis pigmentosa patient generate visual sensations. These phosphenes are obtained at lower thresholds for a train of stimuli than for single pulses, which suggests the existence of a spatial and temporal integrating mechanism. The perceptions are much smaller than those predicted from model simulations. A set of equations are derived which show the effect of pulse current, duration, number and frequency on the position, size and, to some extent, luminosity of the resulting phosphenes.

journal_name

Vision Res

journal_title

Vision research

authors

Delbeke J,Oozeer M,Veraart C

doi

10.1016/s0042-6989(03)00013-0

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

1091-102

issue

9

eissn

0042-6989

issn

1878-5646

pii

S0042698903000130

journal_volume

43

pub_type

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