Different from the commonly known single-focus lenses, many types of functional children's glasses can delay the deepening of myopia and solve visual dysfunction. Functional lenses are increasingly being used to prevent and control myopia in children.
Most of the myopia lenses we usually come into contact with are single-focus lenses. As the name suggests, it refers to a lens with a single focal point. Generally, myopia, hyperopia, presbyopia, etc. we see belong to monocular glasses. A lens has only one luminosity, which is called monocular.
Single-focus lenses are a relatively safe and basic method for correcting refractive errors, with almost no contraindications for children's glasses. When choosing lenses, you can choose according to the various aspects we discussed above, focusing on the core points of clarity, comfort, and aesthetics.
As is well known, an elongated eyeball deepens myopia. The working principle of peripheral defocus lenses is to form a myopic defocus signal in the peripheral retina. Simply put, the lens makes the eye image become a curved surface consistent with the retina, causing the peripheral image that originally fell outside the retina to also fall on the retina. To avoid eye growth and elongation of the eye axis, it plays a role in inhibiting the deepening of myopia.
Through regular single-focus lenses, the central image is imaged on the retina, while the peripheral image is imaged behind the retina. Through peripheral defocus lenses, both central and peripheral images are imaged on or in front of the retina.
This peripheral vision control lens delays the depth of myopia compared to traditional single childrens glasses lens lenses. Moreover, the peripheral defocus lens is a single beam lens with no obvious aberration zone, which does not require changing eye habits. It is more convenient to use and is more suitable for young children who are lively and active.
