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Findings could affect future treatments for macular degeneration, stargardt disease & other forms of retinal diseaseNEW YORK (February 24, 2010) – An international research team led by Columbia University Medical Center successfully used mouse embryonic stem cells to replace diseased retinal cells and restore sight in a mouse model of retinitis pigmentosa. This strategy could potentially become a new treatment for retinitis pigmentosa, a leading cause of blindness that affects approximately one in 3,000 to 4,000 people, or 1.5 million people worldwide. The study appears online ahead of print in the journal Transplantation (March 27, 2010 print issue). Specialized retinal...

A bionic eye implant that could help restore the sight of millions of blind people could be available to patients within two years. US researchers have been given the go-ahead to implant the prototype device in 50 to 75 patients. The Argus II system uses a spectacle-mounted camera to feed visual information to electrodes in the eye. Patients who tested less-advanced versions of the retinal implant were able to see light, shapes and movement. "What we are trying to do is take real-time images from a camera and convert them into tiny electrical pulses that would jump-start the otherwise...

A silicon chip that faithfully mimics the neural circuitry of a real retina could lead to better bionic eyes for those with vision loss, researchers claim. About 700,000 people in the developed world are diagnosed with age-related macular degeneration each year, and 1.5 million people worldwide suffer from a disease called retinitis pigmentosa. In both of these diseases, retinal cells, which convert light into nerve impulses at the back of the eye, gradually die. Most artificial retinas connect an external camera to an implant behind the eye via a computer (see 'Bionic' eye may help reverse blindness). The new silicon...

NEW DELHI: Age-related degeneration of vision has been a common problem, which so far has no cure. However, an ongoing stem cell study at AIIMS might just provide a solution. For about six months now, Dr Rajender Prasad Centre for Opthalmic Sciences at AIIMS has been studying the effect of stem cells in patients who suffer from degenerative vision disorders — the patients taken in the Phase I of study can’t see beyond 3 metre and according to the WHO classification are termed ‘blind’. The study is being conducted on patients who have age-related vision loss or are affected by...