Paranasal sinus mucoceles are benign, slowly expanding, cystic-like lesions that are coated with respiratory epithelium and commonly occur in the frontal and ethmoid sinuses. The etiology of mucoceles can involve congenital anatomic abnormality, infection, allergy, tumor, trauma, and prior surgery and they may result in the obstruction of the sinus ostia, etc. Ophthalmological presentations include diplopia, visual disturbance, epiphora, proptosis, limited ocular movement and orbital displacement, which are the most common symptoms associated with a frontal mucocele. However, post-traumatic frontal mucoceles with intracranial extension, and a subcutaneous mass affecting the forehead are uncommon. Surgical intervention is the preferred treatment.