Your macula is the part of your eye in the middle of your retina. It plays an important role in how you see colour and fine details. Macular degeneration is a relatively common eye condition that is characterised by changes to your central vision due to deterioration of the macula. Lifestyle factors that can contribute to the development of macular degeneration include smoking, being overweight and drinking alcohol. Additionally, the normal aging process can cause changes to the structure of certain proteins in your eye, which can lead to retinal cell damage.