Some potential factors causing fuzzy headaches and blurred vision include migraines, which can cause visual disturbances along with head pain. Additionally, conditions like sinus congestion or allergies can lead to blurred vision and headaches due to increased pressure in the sinus cavities. Other causes may include eyestrain from excessive screen time, dehydration, or medication side effects. It is very essential to consult a healthcare professional for proper evaluation and diagnosis to determine the specific cause and appropriate treatment for these symptoms.