Wearing contact lenses has become a choice of more and more myopia groups. It not only saves vision, improves the value, but also let the nose from being suffered from the frame.
Some women who love beauty even upgrade the lenses, wear cosmetic contact lenses. However, wearing eye contact lenses may be harmful to your eyes.
Several wearing ways may cause irreversible damage to vision. Let me tell you to pick a proper contact lens from 3 dimensions.
When wearing contact lenses, the cornea has the risk of infection, once infected, vision damage is irreversible.
Contact lenses are also called corneal contact mirrors, mainly suitable for people with aesthetic needs or people who need to wear glasses for some special reasons, such as those whose two eyes sights differences are too big to wear frame glasses.
With the appearance of color contact lenses (commonly known as “cosmetic contact lenses”), more and more young people have begun to chase blindly, thinking color contact lenses are better than ordinary contact lenses.
Colored contact lenses are different from ordinary contact lenses, which adds colored coatings on the basis of ordinary contact lenses to achieve decorative effects, and their oxygen permeability and protein adhesion is slightly poor than ordinary contact lens.
80% of the corneal oxygen is from the air, the oxygen permeability of colored contact lenses is lower than that of ordinary lenses, Wearing colored contact lenses too long time may cause corneal hypoxia, corneal epithelial exfoliation or infection, and growth of corneal new blood vessel (blood streak in eyeballs ).
The formal beauty product will use the “sandwich” structure, and the pigment is sandwiched in the middle of the lens. Some inferior beauty products on the Internet or roadside shops, cannot be quality guaranteed, and the damage to the eyes is even greater.
Most of the pigment of inferior beauty is directly printed on the surface of the lens. If the technology is too poor, it may cause pigment to fall, damage the eyes, and induce inflammation.
Some colored contact lenses are badly polished. Their surface is not smooth enough, easy to adhere to bacteria, causing pathogen infections, and even directly damaged in the eyes due to the smashing of manufacturing, and scratched the cornea.
Does wearing contact lenses harm to eyes?
Compared to frame glasses, contact lenses do have lot of conveniences than the frame glasses. But whether wearing contact lenses is harmful to eyes, there are different opinions.
Some people think that wearing contact lenses will damage the eye cornea, and decrease sight. While others think that they have been used to wearing contact lenses and have not found that sight is damaged.
In fact, wearing contact lens mainly cause xerophthalmia. There is a “tear film” on the surface of the eye, which has functions of lubrication, cleaning, etc., The position of the contact lens is on the surface of the eye, and the stability of the tear film is changed to a certain extent and then cause xerophthalmia.
People with insufficient or unstable tear film wearing contact lenses may also aggravate the eyes, eye pain, etc., causing uncomfortable tolerance. However, as long as the contact lens produced by regular vendors and pays attention to science wearing, the harm of the cornea and the eye is small.
However, the following contact lens wearing method may damage vision:
Wearing too long time
There will be “granules” like sands in eye conjunctiva if wearing contact too long time. It is called giant papillary conjunctivitis
Black eye metabolism requires oxygen, while 80% of oxygen needs to be obtained from air. Contact lenses covering the surface of the eye, like a barrier, isolates black eyeballs and oxygen contact, affecting metabolism.
Nice contact lens with good oxygen permeability has relatively small influence on oxygen metabolism. But wearing too long time still causes oxygen hypoxia, increasing the complications rates such as eye angle infection, ulcer, etc. Once severe complications have caused vision damage permanently, they will never be remedied.
Wearing in sleep
When falling in sleep, people close their eyes. Thus the cornea is easier to hypoxia.
The US Mortality and Zexual Weekly issued a study that pointed out that the US Disease Control Center Epidemiological Expert Group has combed analysis of three major country database involving outpatient service centers and emergency rooms, and found that wearing contact lenses overnight can cause a chance of corneal inflammation by 20 times.
In 2018, the US Disease Control and Prevention Center was in the incidence and mortality research report, and he had emphasized that contact lenses can lead to corneal damage or even blindness.
There is age limit to wear contact lenses
In general, contact lenses are more suitable for myopia people aged 16 to 38. Middle-aged men in the age of 40-60 can be worn in a short time, and the elderly in the age of 60 is best not to wear, otherwise it is easy to cause complications, permanent damage vision.
After 40, the eye tissue had obvious degenerative changes. Most of the people have different degrees presbyopic, and the resistance of the eyes is decreased, especially the ability of eye-catching and hypoxia.
At the same time, the tears of the eye have decreased, and some people will have dry eye syndrome. Compared to young people, discomfort will be more, and the complications rates is higher.
Usually wearing contact lenses should not exceed 8 hours. The contact lenses must be taken in following cases:
· When swimming or taking a shower, the lens is easily adsorbed to the pathogenesis and induce an eye inflammation.
· Take the vehicle with open windows. When driving, the surrounding air convection makes the lens moisture to evaporate, and the hard glasses flakes are likely to damage the corneal epithelium.
· Taking airplane. Eyes will be uncomfortable due to the dry air in the cabin.
· In pregnancy. There is changes in hormones secretion in pregnant women, and also in the cornea moisture and thickness . So the lens degree may not be suitable.
· Patients with eye disease. It will be worse if wearing contact lenses.
· It is not suitable to wear in high altitude place.
· Allergic patients, easy to cause complications.
3 dimensions to pick a good contact lens
Ophthalmologists suggest that it is best to wear a frame glasses under unnecessary situation; If you want to wear “contact lens”, you must go to the hospital and other professional institutions first to see if suitable for wearing by the comprehensive assessment of corneal state; secondly, it is necessary to choose the lens suitable for you, but also pay attention to scientific wearing details.
There are hard and soft contact lenses due to different material.
Soft cornea contact lens: common worn by people. The wearer’s corneal surface cannot be flat or steep, and the astigmatism must be less than 150 degrees.
Pregnancy or menopausal women, people with disease like single-eye, diabetes, thyroid eye, mental abnormal patient, or people with poor health habits, health hazards, need to be cautious.
Hard contact lens: It is mainly based on a daily-shaped gas permeable hard corneal contact mirror and night-mounted corneal plastic mirror. Wearing hard mirrors requires more stringent eye detection, absolutely can’t blindly wear.
Hard contact for daily use is mainly used in the treatment of high myopia and high astigmatism, irregular cornea and cone cornea.
Night wear corneal plastic contact is suitable for myopia children over 8 years old. If its close range is rapid, the corneal rules are good, myopia is below 400 degrees, and the astigmatism is 150 degrees, and the day is worn, during the day, the daylight can be temporarily restored to normal .
When choosing contact lenses, the reliable brand is on the one hand, and more importantly, the following three dimensions:
oxygen permeability
At present, the contact lens can be divided into hydrogel and silicone gel. From the perspective of oxygen, the contact lens of the silicone hydrogel material is better
Water Content
Usually, the thinner the lens is, the higher the water content is, the better the oxygen permeability is. But blindly pursuit of excessive water content may be counterproductive. Because the lens will absorb the moisture of the eye, it may increase the symptoms of the eyes.
It is recommended to select a moirter containing 40% to 60% of the water content.
Base arcing
Everyone’s eye size, the curvature is very different. If the curvature of the eyeball is relatively large, the arc of the contact lens is smaller, then the sliding degree of the lens in the eyes will be small, and the eyes are easier to hypoxia; The sliding degree is large, the positioning of the lens will be affected, and the sharpness will decline.
US American Eye Science will give 10 nursing tips for contact lenses to reduce risk of infection:
· Wash the hand with soap before contacting the contact lens;
· Keep contact lenses away from water, such as shower, swimming, etc., Do not use water (tap water or sterile water) to clean and store;
· Do not use brine and eye drops to replace special glasses to disinfect fluid;
· Regular replace contact lenses;
· Gently rub the contact lens with your fingers, wash off the dirt, soak it, rinse it before soaking;
· Wash the glasses box with the care liquid and dry it, remember not to use water;
· Keep the contact lens box cleaning, change it at least every 3 months. Do not use crack and damaged glasses box;
· Do not use repeatedly the old contact lens care solution. Do not transfer contact lens to other containers;
· Don’t let the tip of the care bottle touch any object, it will cover the bottle when you don’t use;
· Do not use the disinfected contact lens that is stored more than 30 days.
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