Primary lung cancer is the leading cause of choroidal metastasis for men, but its revelation by the latter is rare. Case presentation:- The reported observation treats the case of a 50-year-old man who smoked twenty-four packyears, with no particular pathological history, who initially consulted for a rapidly progressive decline in the visual acuity of the left eye. The ophthalmic exam and the explorations concluded to the diagnosis of choroidal metastasis of a primary bronchial adenocarcinoma, which was confirmed by the bronchial biopsy. Clinical discussion:- It is the decline in visual acuity that motivated our patient to consult, which is usually rare since choroidal metastases are often asymptomatic. The diagnosis of choroidal metastasis is usually based on bundle of clinical and radiological arguments. Retinal angiography, ocular ultrasound and MRI visualize nonspecific retinal lesions. The aim of the treatment in choroidal metastases is to preserve visual function. Local radiotherapy has proven its effectiveness and allows regression of symptoms. Conclusion: Before every choroidal metastasis, the search for primary lung cancer must be systematic. The main therapeutic modalities include systemic and local treatments. Currently, the feasibility and effectiveness of various treatment options are controversial around the world.

Keywords : Metastasis, Choroid, lung cancer, adenocarcinoma, radiotherapy