What are the materials of contact lenses?
When it comes to contact lens materials, everyone will feel very professional, after reading a variety of dazzling business recommendations, but also do not know how to make a choice.So, today we're going to look at the materials of contact lenses and the differences between them.
Currently available soft contact lenses come in two main materials: hydrogels and silicon hydrogels.Hydrogels came into being earlier and are widely used to make soft contact lenses. Therefore, most products on the market are made of hydrogels, and non-i onic materials such as HEMA are also classified as hydrogels.Silicon hydrogel is an updated version of hydrogel, which overcomes the shortcomings of oxygen permeability and is very suitable for people with sensitive eyes. It is the best contact lens material available.
The lenses made of hydrogel have good compatibility and elasticity, especially when the eyes are soft and comfortable at the beginning, which can make the eyes adapt quickly. However, the disadvantage lies in the need of high water content to ensure oxygen transportation.As a result, people with dry eyes are restricted to low-water products.
The silicon hydrogel lenses are thicker and can give you a foreign body feel, but their oxygen permeability is significantly improved, perfectly solving the problem of hypoxia in the cornea while retaining moisture.However, the silicone hydrogel material is particularly easy to absorb lipid deposits and is only suitable for use in short-cycle disposable lenses.
When buying contact lenses, the brand is important, and so is the material.I believe that after reading this introduction, we can help you to have a better understanding of the material of contact lenses, and make more suitable choices.