2. Tumor Changes in vision - such as blurred vision, black spots or double vision - can be warning signs of a tumor. If you notice any of these symptoms, it is necessary to consult a healthcare professional for further evaluation 3. Irritation from bright light While sensitivity to bright light can be common, it can also be a sign of serious health problems. An autoimmune disease that complicates the body's ability to fight infection and can lead to serious complications such as heart attack or stroke. 4. Symptoms of skin cancer The eyes can show signs of skin cancer. Keep an eye out for abnormal growths or solid skin on the eyelids, as these may indicate the presence of cancer cells. 5. Frequent headaches Frequent headaches, especially if accompanied by vision changes, may be a sign of underlying eye problems or neurological problems.