What Is A Defocus Lens ?
What is defocus lens: defocus lens is generally added in the glass titanium oxide and other compounds, make the lens thinner, lighter, suitable for the production of high brightness lens, the refractive index of about 1.7, Abbe number is about 40, specific gravity 2.99, the disadvantage is that the dispersion is large, easy to produce rainbow effect, and the nature is soft.
1. Myopic defocusing glasses: It is a resin lens product specially designed based on the principle of myopic defocusing. It not only has the function of refractive correction, but also can effectively prevent the deepening of myopia in teenagers. There are 396 point-like forward optical defocus areas distributed on the lens surface of myopic defocus glasses, which can continuously provide the wearer with myopic defocus function, prevent the occurrence of farsightedness and further prevent the increase of myopia degree.
2. After wearing peripheral defocus lenses, the special optical design can correct the central refractive error while using the peripheral relative positive luminosity to correct the hyperopia of peripheral retina in myopia, so as to avoid the further hyperopia of peripheral retina caused by the wearing of ordinary lenses, so as to inhibit the axial growth and myopia progression caused by peripheral retinal hyperopia.
3. Eyes corrected by defocus lenses: Defocus lenses not only project the image of the central vision onto the retina, but also project its periphery onto the retina or in front of the retina, forming peripheral myopic defocus. In theory, it greatly delays myopia.
