Artificial Silicon Retina.
Working of ASR device
Role of ASR in tracking objects.
Primarily affects the
highest resolution central
portion of the retina
known as the macula.
have severe narrowing of
their visual fields down to a very
small central circle, and all
patients suffering with it are
designed to stimulate damaged
retinal cells from within the retina to
allow the cells to recreate visual
signals that are processed and sent
to the brain.
The ASR microchip is a silicon chip
2 mm in diameter, 25 microns in
IT contains approximately 5,000
microscopic solar cells called
“micro photodiodes,” each with its
own stimulating electrode.
ASR's photoelectric signals can
induce artificial biological visual
signals in the remaining functional
These signals are processed and sent
to the brain through the optic nerve .
top image shows the raw output
of the retina chip, the middle one a
picture processed from it and the
third shows how moving face would
The silicon retina provides
information about the edges of
images rather than a whole picture.
Edge information is usually sufficient
for detecting and tracking objects.
adverse effects were
Retinal visual improvements.
A larger clinical trial is
indicated to further evaluate
the safety and efficacy of a
sub-retinally implanted ASR.