The foot 3D scanner uses optical principles such as laser scanning to detect and measure the human foot, and analyzes and calculates the data through software.
These data include the height and shape of the arch. Through the data of the arch and shape, it can be determined whether it is flat feet.
Among them, the Arch Index (AI) is calculated as follows: AI=M/ (A+M+H)
A (forefoot area): contact area of the forefoot (metatarsophalangeal joint area).
M (midfoot area): contact area of the midfoot (arch area).
H (hindfoot area): contact area of the heel area.
AI (arch index): the proportion of the midfoot contact area to the entire sole contact area.
Through the range of the arch index (AI), it can be determined whether it is flat feet.
AI < 0.21, it is a high arch foot (too high arch).
0.21 ≤ AI ≤ 0.26, it is a normal arch.
If AI > 0.26, it is flat foot (collapsed arch).
