Prevention and control lens

Abstract

The utility model belongs to the technical field of optical lenses, and particularly relates to a prevention and control lens, which comprises a lens body, and the lens body comprises a central light area, a progressive defocus area arranged on the outer side of the central light area, a distant vision area positioned above the progressive defocus area, a near vision area positioned below the progressive defocus area, and astigmatism areas positioned on two sides of the progressive defocus area. The two sides of the lens body are provided with super-clear coating layers, and the sides, away from the lens body, of the super-clear coating layers are provided with hardened coating layers. Two silicon dioxide layers and two titanium dioxide layers are adopted as the super-clear coating layer, the silicon dioxide layers and the titanium dioxide layers are alternately arranged, the thickness of the silicon dioxide layers is 40 nm, and the thickness of the titanium dioxide layers is 35 nm. The defects in the prior art are overcome, by arranging the progressive defocus area, the far-vision area and the near-vision area, switching of far-vision and near-vision is met, smooth transition is conducted, fatigue of the glasses is reduced, and the myopia degree is controlled.

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