What are Aspheric Lenses?

Aspheric lenses have a different surface curvature than ordinary spherical lenses. In order to pursue the thinness of the lens, the curved surface of the lens needs to be changed. In the past, spherical designs were used to increase aberrations and distortion. Narrowness and other undesirable phenomena. The current aspheric design has corrected the image and solved the problem of distortion of vision. At the same time, the lens is lighter, thinner and flatter. Moreover, it still maintains excellent impact resistance, making it safe for the wearer to use.

Aspheric lenses have a different surface curvature than ordinary spherical lenses. In order to pursue the thinness of the lens, the surface of the lens needs to be changed. In the past, spherical design was used to increase aberrations and distortions.

Traditional spherical lenses, the object around the lens is distorted, which limits the wearer's

1Myopia lens to see the fluorescent tube image in the lens

Spherical lens tube image is straight, while the outer surface of aspherical lens above -2.25D reflects the fluorescent tube image in the middle bulging, gradually narrowing on both sides of the barrel shape; the higher the brightness of the lens is more obvious. For low-lightness lenses within -2.25D, there is little difference between directly looking at the outer surface of the lamp tube and the spherical mirror. At this time, the outer surface of the reflecting tube image should be viewed from the inner surface. The saddle-shaped deformation is obvious and the image is large and slightly blurred, while the spherical mirror is still straight.

Aspheric lenses have a different surface curvature than ordinary spherical lenses. Spherical lenses increase aberrations and distortion, resulting in unclear images, distorted vision, and narrow fields of view. The current aspheric design has corrected the image and solved the problem of distortion of vision. At the same time, the lens is lighter, thinner and flatter. Moreover, it maintains excellent impact resistance.
In today's eyewear industry, the pursuit of thin and light lenses can be described as extreme. Aspheric lenses can not only meet the needs of fashion trends, but also have excellent optical performance.

Compared with traditional aspherical lenses, the shape of the front surface of the aspheric lens is more complicated, and the curve is curved from the center of the lens to the edge of the lens. For double aspheric lenses, the surface on the front of the lens is gradually flattened towards the edge of the lens; for doubled aspheric lenses, the surface is gradually steepened towards the edge of the lens. This changing surface has many important advantages. The most important advantage (and the most successful 'buying point') is its beautiful appearance and excellent optical performance.

Compared with aspheric surfaces, spherical surfaces of the same material and the same degree of aspheric lenses are flatter, thinner, more realistic and comfortable. Traditional spherical lenses, the phenomenon of distortion around the objects around the lens, restricts the wearer's field of view, aspheric lens edge aberration is reduced to the end, so that its wide field of view can meet the needs of users. The surface curvature of the aspheric lens is an aspheric design. The advantages of this design over the spherical design lens are: 1. Clearer: the aspheric lens with special coating treatment has perfect visual performance and clearer presentation.

To identify aspheric glasses is actually very simple. Because the aspheric surface does not mean that it should be a plane, it will also have a certain degree of radian. From the side, the aspheric surface is much flatter and less curved than the spherical outer surface. If you touch it from the middle of the lens to the edge with your hand, it will feel very flat. If you have the above findings and feelings after trying, it should be aspherical glasses. At the same degree

The lens has a wide field of view and no arcs at the edges, which minimizes the image difference and the image is very natural. Aspheric lenses are three times harder than spherical lenses, making them more suitable for young people. Also -5.00DS, aspherical lenses are 26% lighter than spherical lenses. The surface of the aspheric lens is relatively flat. It looks very natural and does not deform regardless of the distance, and will not feel tired for a long time.

Those wearing glasses for the first time, especially students and office workers, wear aspheric lenses, which greatly reduces the discomfort when they first wear glasses. People who use contact lenses can use aspheric lenses instead of spherical lenses at home as a backup

Spherical mirrors have the same curvature on both sides of the lens. If the diopter is large, there will be a spherical difference. The curvature on the two sides of non-spherical lenses is optically designed, so the spherical difference will be reduced or eliminated. Whether the refractive power of the lens is the same as that of the aspheric lens. If they are the same, they can be worn alternately. If they are not the same, they cannot be worn interchangeably.

Will wearing aspheric mirrors cause dead fish eyes?

People with short-sighted eyes wear glasses, which will become "dead fish eyes" over time. Don't know what the principle is?

Another "aspheric mirror" was launched on the market. I wonder if wearing "aspheric mirrors" can avoid "dead fisheyes"?

Causes of eye protrusion:

First, myopia, especially after medium to high myopia, the eye axis becomes longer and the eyeball becomes larger. Regardless of whether you wear glasses, your eyes are more prominent than when you are not near-sighted.

Second, the changes are obvious, and they will definitely feel larger. The greater the power of the glasses, the more noticeable it becomes. Non-spherical mirrors only solve the problem of phase difference and cannot prevent eyeballs from protruding.

The aspheric lens has a large gap between the refractive power of the edge and the center area, and the edge of the aspheric lens will be blurred if worn.