Are Contact Llenses Risky? Most People Are Too Casual!
Wearing contact lenses has become the choice of more and more myopic groups, it can not only "save" eyesight, improve the level of appearance, but also prevent the bridge of the nose from the suffering of the mirror frame.
Many women who love beauty even upgrade their lenses and wear contact lenses. But do you know that contact lenses belong to the third class of medical equipment in the country, and there are certain security risks to wear casually, and even blindness can be induced in serious cases, so it must be paid attention to.
Let's talk about contact lenses today
Not everyone is suited to wearing contact lenses
In general, contact lenses are more suitable for myopic people aged 16 to 40. Middle-aged people between 40 and 60 years old can wear it for a short time, and elderly people over 60 years old are best not to wear it, otherwise it is easy to cause complications and permanent damage to vision.
Suitable for people:
1. Refractive error, which is usually said nearsightedness, farsightedness and astigmatism;
2. No other eye diseases and systemic diseases except refractive errors;
3. In order to protect the eye surface, slow the release of some drugs and other special eye diseases correction and treatment.
Not suitable for people:
1. Some patients with acute and chronic eye inflammation, such as acute inflammation at any active stage of the eye, chronic keratitis, chronic uveitis, dry eye, etc.;
2. Acute and chronic sinusitis, severe diabetes, rheumatoid arthritis, etc.;
3. Poor personal hygiene, a large number of smokers, can not be regularly reviewed;
4. Allergic to the ingredients in the care product solution;
5. Poor living and working environment, such as smoke, dust, acid, alkaline dust fog working environment, etc.
How to choose contact lenses?
1. Check first
It is recommended to consult an ophthalmologist or optometrist first to find out if there are any conditions that are not suitable for wearing contact lenses.
2. Select the degree
Contact lenses are attached directly to the surface of the cornea, while frame glasses are 12 mm in front of the eye. In general, more than 400 degrees of myopia, the number of degrees when choosing contact lenses, need to be slightly lower than the frame glasses, far-sighted people are the opposite.
3. Look at the water content
High water content lenses, water is more likely to evaporate, long-term wear easy dry eyes, eyes itchy. But on the other hand, the higher the water content of the lens, the better the oxygen permeability. If it is usually easy to dry eyes, it is recommended to choose contact lenses with lower water content.
4. Look at the base arc
The base arc is the curvature of the corneal surface, which is one of the important indicators to measure whether it is comfortable to wear. Contact lenses should be curved to fit the cornea. The flatter the cornea, the larger the base arc of the contact lens, and the smaller it is.
5. Silicone vs. hydrogel lenses
● Hydrogel lenses have good water absorption and high comfort, but oxygen permeability is generally not high, and it is easy to cause dry eyes when worn for a long time. If you wear it 3-4 times a week, or occasionally wear it, you should choose disposable hydrogel lenses.
● The silicone hydrogel lens has high oxygen permeability, but the lens has less water and feels hard. If the wear frequency is high or the wear time is long, it is recommended to choose a 2-week or monthly cast lens made of silicone hydrogel.
What are the precautions for wearing contact lenses?
1. Wash your hands carefully with clean water and soap before touching the lens, and wait until your hands are thoroughly dry before you can remove and place the lens.
2. Do not wear contact lenses swimming, bathing, overnight, sauna, barbecue, hot spring!
3. Keep your contact lens case clean, replace it at least every 3 months, and do not use cracked and damaged lens cases.
4. Wear the mirror first, then make up, take the mirror first, then remove the makeup!
5. Each time before wearing the lens, please observe the eyes first, if the eyes look different, or feel uncomfortable, temporarily do not wear, let the eyes rest.
