Regular exercise can cut the likelihood of developing the degenerative eye disease, age related macular degeneration by 70%, suggests research published ahead of print in the British Journal of Ophthalmology. This press release issued by Eurekalert says that Age Related Macular Degeneration, or ARMD for short, refers to a condition in which the light sensitive cells in the macula at the back of the eye stop working. This affects central vision and therefore activities, such as driving. It is usually divided into two types--"dry" or non-exudative AMRD--and "wet" or exudative AMRD. The authors base their findings on the number of cases of AMRD arising over 15 years among almost 4,000 US men and women in Beaver Dam, Wisconsin . Participants were aged between 43 and 86 at the start of the study in 1988-90, and were assessed at five yearly intervals.