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 Resjournal_title
Vision researchauthors
Delbeke J,Oozeer M,Veraart Cdoi
10.1016/s0042-6989(03)00013-0subject
Has Abstractpub_date
2003-04-01 00:00:00pages
1091-102issue
9eissn
0042-6989issn
1878-5646pii
S0042698903000130journal_volume
43pub_type
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