Corneal contact lenses, like regular eyeglasses, are used to correct various refractive errors, including myopia, hyperopia, astigmatism, and presbyopia, as well as to treat certain eye diseases such as cone keratoconus and corneal scarring. As the number of people suffering from myopia increases year by year, corneal contact lenses are commonly used to improve people’s quality of life, but in recent years, the complications associated with them have gradually attracted attention. I. Effects on the eyelid Improperly fitting contact lenses may slip from the cornea to the superior vault conjunctiva, and through erosion of the conjunctiva, enter the soft tissues of the eyelid, irritating the soft tissues causing redness and swelling and producing a sterile mass. Repeated friction of the contact lens edge irritates the eyelid conjunctiva, producing chronic inflammation and edema of the soft tissues of the eyelid may also cause ptosis. Effects on the tear film The tear film contains immunoglobulins, complement and other proteins that have a protective effect against infection, while bacteria on the ocular surface can be washed away from the eye surface by tear fluid through blinking movements. The use of contact lenses reduces the exchange of tears for renewal, increasing the time bacteria and debris spend on the corneal surface, increasing the chance of eye infection. Third, the effects on the conjunctiva The chemical composition of the cleaning and disinfecting solution of contact lenses may cause allergic reactions, leading to allergic conjunctivitis. Long-term direct stimulation of the conjunctiva by contact lenses causes an immune response in the conjunctiva, leading to giant papillary conjunctivitis. Fourth, the effect on the cornea The mechanical friction of contact lenses on the cornea can lead to mechanical epithelial defects and cause inflammation of the corneal stroma. The toxic stimulation of the care solution can lead to epithelial defects and erosion. Long-term wearing of contact lenses blocks the contact between the cornea and oxygen in the air, causing corneal tissue hypoxia, resulting in corneal epithelial edema and temporary blurred vision. It tends to cause inflammation of the eye. Long-term stimulation of the cornea by contact lenses can reduce the sensitivity of the cornea, leading to early infections that are not easily detected and can easily accelerate the development of inflammation, leading to edema of the stromal layer, pus accumulation in the anterior chamber, and finally stromal layer necrosis, resulting in blind eye disease. So for patients with refractive error, frame glasses are the first choice to solve the vision, followed by refractive surgery and corneal contact lenses can be considered, of which refractive surgery should be treated in a regular hospital, while patients who choose to wear contact lenses should choose to wear a suitable high-quality mirror on the one hand, and on the other hand need to regularly review their eyes in a regular eye hospital to prevent related diseases.