What is the principle of using a plantar laser 3D scanner to evaluate and judge high arches and flat

The plantar laser 3D scanner is a popular high-tech device for evaluating and judging foot problems such as high arches and flat feet.

So what is the evaluation principle of the arch laser 3D scanner for high arches and flat feet?

The plantar scanner collects 3D data of the human sole through the optical principle of laser scanning. This laser scanning method is non-contact measurement, which can complete the test in only about 20 seconds, with more than 20 measurable parameters and an accuracy within 0.5 mm.

Important parameters include arch height, arch width, foot width coefficient, forefoot area, hindfoot area, total foot area, footprint index, foot length, foot width and so on.

The main judgment of flat feet and high arches is based on the arch index, also known as Arch Index, or AI for short.


AI = midfoot area / total plantar area (excluding the toes).

When the arch index AI < 0.21, it is judged as a high arch.

When the arch index AI > 0.26, it is judged as flat feet.

When the arch index AI is between 0.21 and 0.26, it is judged as a normal foot.

The plantar laser 3D scanner mainly acquires plantar morphology data and can export 3D data in formats such as STL and OBJ. These 3D data can be imported into insole design software for the design of orthotic insoles and personalized design.

Especially for people with flat feet and high arches, designing insoles based on 3D data obtained by a plantar 3D scanner can create insoles with better corrective effects in a shorter time.

Introducing a plantar 3D laser scanner in stores allows free evaluation of flat feet and high arches for customers, as well as intelligent selection of insoles and shoes, recommendation of suitable shoe sizes, and provision of free measurement reports for customers to download, helping customers better understand their feet.

For customers diagnosed with flat feet or high arches, stores can also provide services such as orthotic insoles and correction training, which can expand business, increase more revenue channels, raise customer unit price and improve profit margins.