A woman experienced sudden blindness in one eye, which led to the discovery of metastatic lung cancer. The cancer had spread to her eyes, causing a large mass in her right eye and a smaller lesion in her left eye. This is a rare occurrence, as lung cancer typically does not spread to the eyes. The woman’s case is even more unusual because she was a non-smoker and had no other symptoms of lung cancer. This case highlights the importance of considering lung cancer as a potential cause of visual impairment, even in non-smokers.