A case report of non-classical treatment choice for mycosis fungoides (MF) presented on the left upper eyelid and forehead. Superficial brachytherapy using 3D technique was prescribed to preserve the lens’s functionality, and successfully eliminate malignant lesion. Treatment was conducted with high-dose-rate (HDR) brachytherapy using iridium-192 (¹⁹²Ir) source as a base and Flexitron device as an afterloader. Applicators were immobilized and located near the lesion by manually shaped molds. Doses were calculated using Oncentra treatment planning system (ELEKTA^®) with 3D models based on CT scans. A 12-month follow-up showed sustained remission without any late toxicity or recurrence of MF skin lesions on the face.