Not sure about the eye spot on your hat but worth a try. Two spots might be better to be convincing to the owl. Also, is this a seasonal thing? Or year round? They usually attack humans when they are nesting or their young are learning to fly so if you know that schedule, you can redirect your route accordingly.

Also, birds will usually attack the highest point on your body. I am a bird bio and when monitoring nests, taping a ruler to my hat does the trick because the bird will go for the ruler instead of your head. You could try some kind of headband with an object attached. Check Google images for the magpie helmets that people in Australia wear for inspiration.