You might think your vision is fine or that your eyes are healthy, but visiting an eye-care professional for a comprehensive dilated eye exam is the only way to be sure. When it comes to common vision problems, some people don’t realize they could see better with glasses or contact lenses. Many common eye diseases such as glaucoma, diabetic eye disease and age-related macular degeneration often have no warning signs. A dilated eye exam helps detect these diseases in their early stages.