The problems are in the genes!

Scientists in New York have found that almost 75% of the worlds most common cause of blindness (
Age-related Macular Degeneration) is caused by 2 genes.

The scientists expanded previous research which had only identified one of the genes, resulting in only a third of cases being diagnosed, but by combining research results into both genes they were able to discover that they work in tandem.

This could be the first steps to producing a treatment meant to prevent this disability from occuring. This line of research will be interesting for the next few years.

Source: http://news.bbc.co.uk/1/hi/health/4771608.stm