There is a lot of attention being paid to lifestyle factors that may have an effect on the development and progression of the disease. High blood pressure and smoking are definitely contributory factors. The only way to know if you have high blood pressure is to have your doctor check for it. If you smoke, this is the time to stop. Watch your blood pressure and your diet.
Nutrition appears to play a role in the health of the macula.
In addition to supplements, there are common food sources for the vitamins, minerals and other substances necessary for good retinal health. In general, the kind of low fat diet that supports cardiovascular health is one that also contributes to healthy eyes. Finally, protect your eyes from the damaging rays of the sun by using a hat or visor and sunglasses. Most sunglasses allow some direct sunlight to enter from the top and sides of the frame. There are sunglasses designed specifically for macular degeneration that include side panels and a ridge at the top of the glasses so that all light is filtered.