Vision, ego, seeing, and opinion are all related. If someone has a lot of vision, that might be interpreted as ego. When you see something, when you really see it strongly, with who you are, that's an opinion. Being opinionated may be interpreted as ego. If you are intensely engaged with reality, that could be interpreted as ego.
What makes vision, seeing, and opinion "ego" might be some factor of how much your visions, your seeing, and your opinions are "about you", how self-serving they are. If you are pure in heart, then you can engage with reality intensely, have vision, see things, and have opinions, and make it really about the whole, rather than just your own interest.