An 18-year-old leukemia patient developed a serious fungal eye infection from Fusarium during cancer treatment. The infection spread through the bloodstream to both eyes, causing serious inflammation and vision loss. Doctors treated it with multiple antifungal medications injected directly into the eyes along with systemic medication, which controlled the infection but unfortunately the patient’s vision was significantly affected. This case highlights how rare but serious eye infections can occur in cancer patients with weakened immune systems.