The measurement of distance between metatarsal heads in a severe hallux valgus. The orange line is parallel to the axis of first metatarsal and in the lateral of the second metatarsal head. The wathet-blue line is the distance from the lateral of the first metatarsal head to the medial of the second metatarsal head. The yellow line is parallel to the axis of second metatarsal and in the lateral of the third metatarsal head. The white line is the second metatarsal head to the medial of the third metatarsal head