Month, season, half a year, etc. In fact, it refers to the shelf life of glasses after opening. Take the contact lens that has been thrown away for half a year as an example. If it has been thrown away for half a year, it shows that the glasses belong to expired products after being opened for half a year. Contact lenses can't be "stopped", because after the expiration of contact lenses, their lenses will age and deform, and their oxygen permeability will be reduced, which will easily damage the eyes.
Extended data
Not suitable for people who wear contact lenses.
1, teenagers
Teenagers are still in the stage of growth and development, the visual axis of the eyeball has not yet been finalized, and the degree of myopia astigmatism is unstable and changes rapidly. In many cases, it is pseudomyopia and glasses are not needed. Teenagers' self-care ability is poor, they don't pay much attention to hygiene, and they also tend to ignore the cleaning and disinfection of contact lenses, which is easy to cause eye infections and even hurt the cornea in severe cases.
2. Patients with cold and fever
People who have a cold and fever generally have more bacteria on their hands, which are easy to bring into their eyes when wearing or taking contact lenses. At the same time, most of the anti-cold medicine ingredients taken by patients with cold and fever have the effect of inhibiting tears, which will make the eyes dry and not conducive to wearing contact lenses.
3. People with poor working environment
If the working environment is not good, foreign objects in the air can easily enter the eyes, causing eye discomfort and eye inflammation. Wearing contact lenses may aggravate the condition.
4. People with eye diseases
If you suffer from dry eye, keratitis, conjunctivitis, trachoma, glaucoma and other eye diseases, it is best not to wear contact lenses, otherwise it will cause irritation to your eyes and easily aggravate your condition.
People's Network-There are many kinds of contact lenses.
People's Network-Who is not suitable to wear contact lenses?