In an ideal optical system, external objects will be perfectly imaged on the retina after passing through the refractive system of the eye. However, due to factors such as the distance between the discount prescription glasses lens and the eye, when external objects are imaged by the refractive system of the eye, the surrounding images will fall behind the retina, resulting in peripheral hyperopia defocusing.

Peripheral defocus lenses can reduce the peripheral hyperopia defocus signal behind the retina by normalizing the degree of the periphery (different fixation directions may vary).

Peripheral defocused frame kids eyeglasses online, on the other hand, increase the positive degree of specific peripheral parts, thereby focusing the peripheral image on the retina, thereby achieving the effect of controlling the growth of the eye axis and myopia degree. To slow down the development of myopia, peripheral defocus lenses have a weaker effect on controlling the development of myopia.

A myopia prevention and control framework product based on competitive myopia defocus theory, with the focus in front of the retina, the position of the focus determines the trend of axial growth, and the effect of myopia defocus controlling axial growth is more advantageous.

Simultaneously generating two competing signals in the eye, one focused on the retina (or slightly behind) and the other in front of the retina; Myopia defocus stimulation has a relatively stronger effect and can slow down axial growth; The imaging on the retina is clear, and a deceleration signal surface is formed in front of the retina. Through this design, the goal of preventing and controlling myopia growth is achieved.

The myopia prevention and control kids eyeglasses online based on gradient defocus design form a defocus area with a certain thickness in front of the retina of the eye, which has better control over axial growth and myopia.