PLZ HELP ASAP!! There are many diseases that can affect the eyesight of people. These diseases are often caused many different things such as poor nutrition, heredity, or accidents. Choose a disease that affects the eyes and research it, then write a informational brochure about the disease. Your brochure should include what the disease is and how it is caused, how the disease can be treated, if the disease can be prevented, the affect it has on your eyesight, pictures of your disease, and any other important information about the disease.