Which vision type, used at dawn, dusk, and in full moonlight, does the handbook call the most dangerous?

1. 1Photopic vision
2. 2Mesopic vision
3. 3Scotopic vision
4. 4Peripheral vision

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Vision, page 443