Subretinal electronic chips allow blind patients to read letters and combine them to words.
Subretinal electronic chips allow blind patients to read letters and combine them to words.
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DOI:
10.1098/rspb.2010.1747
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发表时间:
2011-05-22
期刊:
影响因子:
--
通讯作者:
Wilke R
中科院分区:
文献类型:
--
作者:
Zrenner E;Bartz-Schmidt KU;Benav H;Besch D;Bruckmann A;Gabel VP;Gekeler F;Greppmaier U;Harscher A;Kibbel S;Koch J;Kusnyerik A;Peters T;Stingl K;Sachs H;Stett A;Szurman P;Wilhelm B;Wilke R
A light-sensitive, externally powered microchip was surgically implanted subretinally near the macular region of volunteers blind from hereditary retinal dystrophy. The implant contains an array of 1500 active microphotodiodes (‘chip’), each with its own amplifier and local stimulation electrode. At the implant's tip, another array of 16 wire-connected electrodes allows light-independent direct stimulation and testing of the neuron–electrode interface. Visual scenes are projected naturally through the eye's lens onto the chip under the transparent retina. The chip generates a corresponding pattern of 38 × 40 pixels, each releasing light-intensity-dependent electric stimulation pulses. Subsequently, three previously blind persons could locate bright objects on a dark table, two of whom could discern grating patterns. One of these patients was able to correctly describe and name objects like a fork or knife on a table, geometric patterns, different kinds of fruit and discern shades of grey with only 15 per cent contrast. Without a training period, the regained visual functions enabled him to localize and approach persons in a room freely and to read large letters as complete words after several years of blindness. These results demonstrate for the first time that subretinal micro-electrode arrays with 1500 photodiodes can create detailed meaningful visual perception in previously blind individuals.
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DOI:
10.1007/bf00363531
发表时间:
1953-01-01
期刊:
PFLUGERS ARCHIV FUR DIE GESAMTE PHYSIOLOGIE DES MENSCHEN UND DER TIERE
影响因子:
--
作者:
AULHORN, E
通讯作者:
AULHORN, E
影响因子:
4
作者:
Jensen, Ralph J.;Rizzo, Joseph F., III
通讯作者:
Rizzo, Joseph F., III
影响因子:
4.4
作者:
Bach, Michael;Wilke, Michaela;Wilke, Robert
通讯作者:
Wilke, Robert
影响因子:
4.4
作者:
Schulze-Bonsel, K;Feltgen, N;Bach, M
通讯作者:
Bach, M
影响因子:
1.8
作者:
Eckhorn, Reinhard;Wilms, Marcus;Walter, Peter
通讯作者:
Walter, Peter