Holds hope for sufferers of macular degeneration
For the first time researchers have shown that transplanted stem cells can preserve and improve vision in eyes damaged by retinal disease. In the cover article in the November 2004 Investigative Ophthalmology and Visual Science, scientists from Harvard’s Schepens Eye Research Institute describe results of a mouse study in which transplanted stem cells develop into retinal cells, prevent the death of "at risk" retina cells in the recipient mice and improve the vision of treated mice. "These findings hold great promise for potential treatments for people suffering from macular degeneration, diabetic retinopathy and other retinal diseases," says Michael Young, PhD, an assistant scientist at Schepens Eye Research Institute and the lead author of the study.
The retina is a tissue-thin membrane at the back of the eye responsible for sending light and images from the outside world through the optic nerve to the brain, which interprets them. The retina contains light sensitive cells, known as rods, which make it possible for us to see in black and white and in low light, and cones, which are responsible for color and high-acuity vision. In diseases such as macular degeneration, it is these cells that are being destroyed.
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