Contact lenses, also known clinically as contact lenses, are corrective in the same way as prescription frame glasses. The difference is that contact lenses require direct contact with the cornea. Because of this, contact lenses can help improve the quality of life and work by getting rid of eyeglass frames, improving the visual effect and quality, and reducing magnification changes. The main disadvantages are also due to the direct contact with the cornea and conjunctiva, which can easily affect the normal physiology of the eye surface. Once the wrong way of wearing, wearing too long and other problems, may cause the wearer to have symptoms of disease such as eye redness, pain, vision loss, inflammation of the conjunctiva or cornea. Different material contact lenses are mainly divided into soft and hard lenses, and there are differences between the pros and cons of these two types of glasses: 1. Soft lenses: they are made of polymer compounds containing water, which have the advantage of soft lenses and high wearing comfort. However, soft lenses are prone to protein and lipid deposits on the lens surface, and improper cleaning or wearing methods may induce conjunctivitis. Soft lenses need to be replaced regularly to reduce the impact on the eye. The people who are suffering from eye surface disorders are not recommended to choose soft lenses to wear; 2, hard lenses: hard lenses are made of hard hydrophobic material, the advantages of hard lenses have higher oxygen permeability, the surface of the mirror is resistant to protein deposition, care and cleaning is easier and more convenient than soft lenses, imaging effect is better, but also has a certain role in the correction of corneal astigmatism. However, hard lenses have high requirements for corneal optometry, which requires precision and takes time for the wearer to adapt. As mentioned above, contact lenses have both advantages and disadvantages. You need to choose the right contact lenses according to your vision condition, work needs and other medical advice. If you need to wear contact lenses, it is recommended that you go through regular channels and pay attention to the daily care of your contact lenses and choose a suitable eye lubricant.