Light is focussed on the retina at the back of the eye. The macula is a small area in the centre of the retina that we use to read and see fine detail. The macula consists of several layers of tiny cells. As we get older, these cells can fail to function properly leading to a build up of deposits and a loss of cells. This can lead to distortion and over time, it can become difficult to read and see fine detail. The condition usually progresses quite slowly and various aids are available to help you to see smaller print.