What are the hazards of wearing contact lenses after expiration_contact lenses_
There are disposable types of contact lenses in use. If the use time is exceeded, they cannot be used. This is also the service life of each contact lens. As the contact lens expires, its performance will change, which is disadvantageous for some wearers. Let's take a look at the dangers of wearing contact lenses after they have expired. After the lens expires, the oxygen transmission rate of the lens will decrease. The eyes need oxygen. Once the oxygen transmission rate is reduced, the cornea will easily cause hypoxia, the cornea will not be able to metabolize, and the cornea will have many adverse conditions. Corneal infection is one of the more common phenomena. one. Lens deposits can cause eye infections. The accumulation of lens deposits on the lens reduces the clarity of the lens, and these deposits are easy to breed bacteria. If the lens is not clean, bacteria can easily cause eye infection and cause related ophthalmic diseases. The hygiene and cleaning of the lenses is one of the most important issues that should be paid attention to when wearing contact lenses. Moreover, if there are too many deposits, it will also affect the light transmittance of the lens, thereby affecting the vision. If you wear it for a long time, the eyes will be easily fatigued and the vision will easily decline. After the contact lens expires, the water content will also change. If the water content of the contact lens decreases, the lens will become hard. If it is worn for a long time, it is easy to rub the cornea, causing the cornea to be injured, and the wearing feeling will be greatly reduced. Therefore, it is necessary to replace the lens in a timely manner. Relevant research results are that the lifespan of soft contact lenses is only 2,600 hours, so the wearing of contact lenses also depends on the time of wearing each day. If the wearing period is exceeded, the more it exceeds, the more serious the consequences will be.