For most people, cataracts occur naturally through the process of ageing. The most common age is between 65-75years. A cataract clouds the lens of your eye, making it look milky, and the condition becomes worse over time. Symptoms include hazy vision causing blurred or distorted images, colours that appear more yellow and needing more light to see clearly.
In macular degeneration, the part of the retina that processes detailed vision (the macula) degrades, affecting central vision. It's the leading cause of vision loss in Australia for those over 50. There are two types of macular degeneration, wet and dry.
Glaucoma is the name given to a group of eye diseases where vision is lost due to damage to the optic nerve. The damage to the optic nerve causes a gradual loss of sight, especially in the loss of peripheral vision. Generally, as there are no symptoms or warning signs in the early stages of glaucoma, there can be significant loss of vision before there is an awareness of any problem, so the best way to ensure someone does not have glaucoma is from a comprehensive eye test that includes checking eye pressure and other risk factors.