Myopia control is the "peripheral defocus principle", which allows the refractive power of the lens to gradually decrease from the center to the periphery, so that the peripheral image falls in front of the retina, preventing overcorrection of peripheral vision and reducing peripheral hyperopia defocus.
This type of lens is called "peripheral defocus lens", also known as "myopia management lens" or "myopia management glasses".

For Defocus Lenses，the appearance is same as ordinary glasses, but the lenses have a special defocus design. Defocus lenses are designed similar to orthokeratology technology. By adding hyperopic defocus in the peripheral area of the lens. Move the focus projected behind the retina onto or in front of the retina,creating a myopic defocus signal. It can inhibit the phenomenon of eye tracking and make the vision clear. Also slowing down the growth rate of the eye axis and the progression of myopia at the same time.
Lenses Material:Hard Resin/Polycarbonate/Arcylic/MR8/MR7/MR174 
Lenses Color: Clear
Abbe Value: 38(ND-1.56),32(ND-1.59)
Diameter: 50/55/60/65/70/75/80mm
Coating: HMC,SHMC
Logo:  Accept fog mark and laser mark on the lenses
Packing Envelope: White and Color customized envelope

Rx Freeform Lenses can be customized according to the wearer's prescription, eye habits and movements, making daily wear more comfortable.
In twenty thirteen, we made an important decision to import machinery from Germany(SATIS LOHVFT Obrit) for the manufacture of the individualized progressive spectacles, embodying the manufacture's vision to create Free Form lenses of the high quality standards and the adapted to consumer needs. 
Our free-form lens production capacity is one thousand pairs per day. Normally, the production time for a pair of custom lenses is two-three days. So if you cooperate with us, our reward will be high-quality lenses and timely delivery.
At present, our company promotes three free-form progressive designs: IOT, Schneider and optotech. Among them, IOT and Schneider are high-end designs, and optotech is an economical design, providing consumers with more price choices.