What does the bright moon free-form lens mean?

The surface produced by Shanghai Yueming Glasses Co., Ltd. has no optical device that rotates or translates symmetrically around the optical axis. Yue Ming is the brand of Shanghai Yueming Glasses Co., Ltd. Free-form lens is an optical device with no rotational symmetry or translation around the optical axis. Yue Ming freeform lens is an optical device produced by Shanghai Yueming Glasses Co., Ltd. It has no rotational symmetry or translation around the optical axis. Shanghai Yueming Glasses Co., Ltd. is a platform service provider of optometry industry chain, which takes lenses as the leader and spans many fields such as optometry, materials science, medicine and industrial manufacturing.