Metastatic tumors to the eyes are probably the most common type of intraocular malignancies. The most common metastatic tumor is the breast cancer overall and lung cancer in men. An eyeball metastasis from lung cancer has a poor prognosis. Differentiating an eyeball metastasis from the primary malignant melanoma is important. Eyeball metastasis of a lung adenocarcinoma confirmed by pathology has not report in Korea. Here we reoprt a case of a metastatic lung adenocarcinoma to the eyeball confirmed by enucleation and a transbronchial lung biopsy with a review of the relevant literature.