A 58-year-old man presents to the ophthalmology clinic with a 3-week history of progressive vision loss in his left eye. He reports difficulty reading and bumping into objects on his left side. On examination, visual acuity is 6/18 in the left eye. Confrontation visual fields reveal a complete loss of vision in the left upper and lower quadrants, sparing the central 10°. Fundoscopy shows a normal optic disc and macula. MRI brain with contrast shows a mass in the left temporal lobe compressing the optic radiations. What is the most likely visual field defect?