When you reach the age of 40, your eyesight starts to deteriorate. This is because the lenses in your eyes become less flexible, making it difficult for you to focus on close objects. Presbyopia is a natural part of the ageing process and affects everyone to some degree. There are several other factors that can contribute to presbyopia, including diabetes, high blood pressure, cataracts, or glaucoma. If you have any of these conditions, you may be more likely to develop presbyopia at an earlier age. However, timely treatment for presbyopia can save the condition from getting worse.