Eyeglasses are an indispensable part of many people's daily lives, not only correcting vision and protecting the eyes, but also serving an aesthetic purpose. A pair of suitable lenses is essential for glasses to work.
Usually, we choose the lenses we need based on their function. For example, in order to read electronic devices, we use blue light blocking lenses; outdoors, we use sun reading glasses; and when driving, photochromic and progressive lenses are good for us.
However, did you notice that depending on the manufacturing process, lenses can also be divided into spherical and aspherical lenses? Next, let's take an in-depth look at the differences between these two types of lenses!
A spherical lens is one in which each surface has the same curvature, i.e. each surface has a fixed radius of curvature, whereas an aspheric lens has two surfaces with different curvatures. As a result, spherical lenses are easier and less expensive to machine. Also, because spherical lenses are a common type of lens, opticians usually offer a wider range of spherical lenses, making it easier for shoppers to find the right frames and lenses for them.
However, there are some issues with spherical lenses that should not be overlooked. Firstly, the curved design of spherical lenses can cause the field of vision to be distorted or tilted at certain angles, particularly at the edge of the lens, which can affect the visual experience and cause discomfort to the wearer.
Spherical lenses have the same radius of curvature, leading to the problem of distortion at the edge of the lens (the area further from the centre), i.e. false distortion. In addition, spherical lenses may not be aesthetically pleasing, especially for high count lenses, and their thickness and shape may be less than ideal.
And aspheric lenses are the perfect solution to these problems. Aspheric lenses are able to eliminate the aberration problem of spherical lenses and improve the clarity and contrast of images through complex curved surface design. Their wider field of view and higher image quality provide a more natural and comfortable viewing experience for the wearer.
Aspheric lenses are flatter and thinner than spherical lenses of the same prescription, which not only reduces the weight of the lenses, but also improves aesthetics. This feature is especially important for people with high amounts of nearsightedness or farsightedness.
SHOP THIS READING GLASSESHowever, the manufacturing process of aspheric lenses is relatively complicated and requires a higher level of technology and investment in equipment, making them more expensive to produce and relatively more expensive. Because aspheric lenses provide a wider field of vision and a more natural visual effect, it may take some time for the wearer to adapt to this new visual environment. This adaptation period may be longer, especially for long-term wearers of spherical lenses.
Don't worry, Eyecedar is here to help! We offer a thirty day money back guarantee. You can try Eyecedar's high quality aspheric reading glasses without worrying about losing money! At the same time, Eyecedar also has a special offer for you to get a better quality product at a lower price!
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