There are other natural ways to slow or stop progression of macular degeneration. Certain nutrients such as omega-3 fish oil and CoQ10 with L-Carnitine have been found to help slow down this condition and preserve vision. The most common causes are free radical damage from ultraviolet and blue light from sunlight passing through the crystalline lens. So, incorporating anti-oxidants like acai, goji berry, blue berries and others into the diet will be very important. Most sufferers of Macular Degeneration are also deficient in many imporant nutrients including fatty acids, lutein, bioflavenoids, zinc, selenium, vitamin B complex. I think it may be a good idea to consider adding these into the diet. If your relative is a smoker, he should consider giving that habit up as smoking causes serious radical damage and oxidation due to reactive chemicals in cigarretes.