As a medical product for correcting eyesight, contact lenses are by no means ordinary consumer goods, and the purchase of contact lenses is not simply a commercial behavior, but has a certain degree of medical professionalism. For example, the degree of contact lenses is generally lower than that of Glasses Frames, and the specific value should be converted; Astigmatism patients should customize special astigmatism Clear Eyeglasses lenses; People with sensitive eyes can choose materials with higher water content to buy according to the examination results and suggestions of professional doctors, so it is better to buy contact lenses in the hospital ophthalmology or regular glasses shop.
On the premise of the same material, the higher the water content, the better the oxygen permeability, the softer the lens, and the more comfortable to wear. Because of this, many people simply understand that the higher the water content of the lens, the better. Is this the case? Of course not. In fact, if the water content is higher than 50%, the Transparent Eyeglasses is easy to be damaged and deformed, and it is easy to attach protein and other sediments, which is unfavorable to the astigmatism correction ability. Therefore, it is generally only used for day throwing Clear Frame Glasses; On the contrary, the lower water content can be used to prolong the service life of the lens, reduce the attached sediment, correct slight astigmatism and other favorable factors, and can be used for semi annual and annual contact lenses.
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