Go Behind the Mystery of uveal melanoma and learn more about ways to help those with COPD. Chronic obstructive pulmonary disease (COPD) refers to a group of diseases that cause airflow blockage and breathing-related problems. Noninvasive ventilation can not only help you breathe in more oxygen , but also expel CO2 – helping to rest the muscles that are working overtime. Melanoma is a type of cancer that usually affects the skin, but uveal melanoma is a disease in which cancer cells form in the eye . Many times, it does not cause any symptoms, and it is often detected during a dilated eye exam, which is performed during a routine eye exam.