Preliminary data from human embryonic stem cell trials for two degenerative eye disorders are promising, but challenges remain for more complex tissues.

After the pioneering stem cell company Geron, which launched the first-ever clinical trial for a human embryonic stem cell (hESC) therapy in 2010, shuttered its stem cell program last November for financial reasons, a shadow fell over the field of stem cell medicine. But yesterday, optimism rose as the stem cell research company Advanced Cell Technology (ACT) published in The Lancet preliminary data from two human patients, each with a different degenerative eye disorder, showing safety and perhaps even some efficacy of an hESC treatment.

read more : http://the-scientist.com/2012/01/24/eye-trials-give-hope-for-stem-cells/