1.   He estimates that as many as one in six of those who have this form of macular degeneration suffer from the inherited form.

2.   In the inherited form, one mutation was present in every body cell.

3.   Still, for those who worry about diseases which have an inherited familial form, a frightening certainty looms closer with each genetic discovery.

4.   Yet art is always a dialogue between individual sensibility and inherited forms.

5.   But researchers hope that learning about the inherited form will shed light on the sporadic type, perhaps leading to new treatments.