A 50-year-old Indian man presented with headache, and blurred vision in his right eye for the last three months. He had no history of seizures, vomiting or dizziness. However, he stated that he had occasional dry cough for the past four to five months. A thorough ophthalmic and systemic examination was carried out. Ocular examination revealed his best corrected visual acuity to be counting fingers at one foot in the right eye and 20/20 in the left eye. Results of his slit lamp examination were unremarkable. His pupils were of normal size and normal reaction. His ocular movements were normal in all gazes. His intra-ocular pressure was also normal. His systemic examination showed bilaterally symmetrical chest movements. Vesicular breath sounds were audible bilaterally, but sounds on the right side were decreased as compared to the left side. Vocal fremitus and vocal resonance were decreased over the right side from the first to fourth intercostal space. No added sounds were audible. No lymph nodes were palpable clinically. A fundus picture of his right eye showed an ill-defined, yellow-white elevated lesion in choroid about three to four times the disc diameter in size, superior-temporal to the disc. A fundus picture of his left eye was normal. Meanwhile, fluorescein angiography of our patient's right eye revealed hyperfluorescence from the surface of his choroidal tumor. The tumor was on its late phase and it had already accumulated sub-retinal fluid. A B-scan ultrasound revealed a flat-surfaced, elevated choroidal lesion with moderate internal reflectivity. Routine systemic investigations including complete blood cell count, platelet count, bleeding time, clotting time, urine analysis, serum electrolytes, blood biochemical studies for hepatic and renal functions, as well as specific investigations like carcinoembryonic antigen, prostatic specific antigen and serum acid phosphates were all within normal limits. Results of our patient's bone scan, and upper and lower gastrointestinal series were also normal. A chest X-ray showed a homogenous opaque mass in our patient's right hilar area. His Mantoux, immunoglobulin M, and immunoglobulin G for tuberculosis tests were all negative. A computed tomography scan of our patient's thorax showed a right central bronchogenic carcinoma with ipsilateral lung having distant metastasis. Computed tomography-guided fine needle aspiration cytology from his right lung lesion was suggestive of adenocarcinoma of the lung. Ultrasound of his whole abdomen showed mild hepatomegaly with no focal lesions. We prescribed six cycles of chemotherapy and the patient subsequently showed an improvement in vision. His subjective improvement after the first chemotherapy was about 50%. His best corrected visual acuity was 20/80 in the involved eye. He was administered chemotherapy based on gemcitabine and carboplatin. He had significant progressive subjective and objective improvement since his first chemotherapy. His current best corrected visual acuity is 20/30 after six cycles of chemotherapy [AU: the abstract states his best acuity after three cycles is currently 20/60 - please clarify the inconsistency and/or provide more information about acuity at all treatment cycles in the body of the manuscript] in the involved eye. Recent fundoscopic examination did not show any mass.