In my memory, when I was a child, it was cheaper to have glasses lenses, and frames. Nowadays, the more popular children's eyeglasses on the market are not due to price increases, but rather product technology upgrades.

The main thing is the defocusing mirror. First, understand the difference between a defocusing mirror and a regular mirror. Ordinary lenses, referring to single lens lenses, are mainly used to meet the needs of wearers who cannot see clearly, and can only correct defocusing in the central macular area of the eye.

The imaging design of the optical zone at the center of the lens is completed on a plane, but in reality, the human retina is curved, and the imaging of the central part of the lens is exactly on the retina, while the peripheral imaging is behind the retina, thus forming "farsightedness defocusing".

Defocus childrens eyeglasses lenses are specially designed lens products based on the principle of defocus. In addition to having a refractive correction function, they can also effectively prevent children's myopia from deepening.

Compared to ordinary single-lens lenses, defocused lenses not only project the image at the center of vision onto the retina but also use technological means to project the periphery onto the retina or in front of it. This can avoid axial growth caused by eye self-regulation, alleviate the increase in myopia degree, and make myopia degree tend to stabilize.

Ordinary single-lens lenses can only solve the problem of unclear vision; Defocus lenses not only solve the problem of blurred vision but also play a role in controlling the progression of myopia.

Adolescent defocusing lenses are brand new to myopia prevention and control frame children's eyeglasses. Ordinary glasses are used to correct vision, while anti-myopia lenses can slow down myopia.