What is the center thickness of contact lenses?

For the vast majority of wearers, it is not necessary to confirm the parameter of center thickness when purchasing contact lenses, so the importance of center thickness is gradually ignored. But as the materials of the lenses continue to improve and contact lenses become thinner and thinner, the center thickness will become more important for contact lenses.


Just as its name implies, the central thickness is also the most central thickness of the contact lens lens. We all know that the edge of the contact lens is inconsistent with the thickness of the center, the edge is thinner, and the thickness of the middle varies depending on the degree. When measuring, the lens is placed on a professional instrument to read the central thickness from the scale. In general, those with less than 0.06mm are ultra-thin, those with 0.06-0.1mm are thin, and those above 0.1 are called thick.

 The central thickness of the contact lens may have some impact on the formability and durability of the lens. Although the thick lens formation is better, but the oxygen permeability may be reduced. The thin lens can provide more adequate oxygen for the eyes, which helps in the circulation of tears, but it is easy to break, and it will be difficult to wear.


In addition, the higher the degree, the thicker the center of the lens, but this difference is small, generally does not have much impact on the feeling of wearing. Moreover, if the degree of myopia is relatively deep, it may also produce astigmatism at the same time, which requires the configuration of astigmatism contact lenses. The thickness of astigmatism contact lens lenses is not uniform, and it also increases the design of stable axis in the structure design.

Wearing contact lenses may cause eye diseases if you do not pay attention to them. We must know more about them!