Animals see differently than humans. So what might be bright to us is hard for them to see. And what might be normal to use could stand out like a bright light to them.
Deer Vision helps you see like a deer sees. Their eyes are made differently and its hard to know what might stand out when hunting.
Deer Vision manipulates the camera image in real-time to change the colors. This way you can see a scene as they see it.
Once you know what stands out, you can make changes necessary to blend in.