Tear secretion disorder caused by conjunctival injury caused by trauma
Wearing contact lenses for a long time and not paying attention to cleanliness, especially using inferior cosmetic contact lenses with substandard quality, can easily lead to dry eye.
Some myopia patients will have temporary dry eyes after laser surgery.
Dry eye is chronic and needs long-term scientific treatment, but many people will buy several kinds of eye drops at will and drop them into their eyes when they encounter eye discomfort. This kind of abuse of eye drops can not only really relieve eye fatigue, but also irritate the eyes, and the situation will be worse in the future.
To know what to use and what not to use, we should start with the abused eye drops in the market.
Eye drops that are often abused in the market.
1. Eye drops for removing red blood.
The main components are naphazoline hydrochloride, oxymetazoline hydrochloride and tetrahydrozoline hydrochloride.
This kind of eye drops is very popular because it can constrict blood vessels and reduce eye congestion. However, this method is not a radical solution. It only temporarily constricts blood vessels. If the cause of eye congestion is not solved, it will only get worse in the future.
Frequent use can also lead to large blood vessels and dilated pupils, which is a risk of dependence.
2. Cool eye drops
The main ingredients are: pearl liquid, borneol, mint, camphor, bear bile, houttuynia cordata, etc.
Many people feel that their eyes are dry, and then the eye drops are cold and cool, and their eyes are comfortable immediately, so they choose this eye drop.
But these ingredients are not what the eyes need, they just bring a comfortable feeling. Whether these substances are harmful to the eyes, there is no relevant research result at present, which means that this kind of eye drops is risky.
3. Anti-inflammatory/antibacterial eye drops
Main ingredients: dexamethasone, prednisone, betamethasone, cortisone, etc. (anti-inflammatory); Tetracycline, neomycin, chloramphenicol, etc (antibacterial).
Anti-inflammatory potions are mostly hormones, and antibacterial potions are mostly antibiotics.
These cannot be used for a long time.
Many people think that itchy eyes are caused by inflammation and want to use anti-inflammatory eye drops. These eye drops can really diminish inflammation and sterilize, but they must be used under the guidance of a doctor.
If there is no inflammation, you have to use anti-inflammatory eye drops, which are not good for your eyes except as a stimulus.
Random abuse may also lead to glaucoma and irritating cataracts, and long-term use will produce drug resistance. If you are really infected with bacteria in the future, it will be difficult to treat.
4. Eye drops with weak pupil contraction
Main ingredients: Neostigmine methyl sulfate.
This kind of eye drops can strengthen the adjustment ability of eyes, which is equivalent to the stimulant of ciliary muscles.
After using it, you can see clearly and continue to work in a short time, but after taking the medicine, it will only aggravate your fatigue.
For people with pseudomyopia, long-term use of this eye drop may accelerate the development of myopia.
So what eye drops should be used for dry eye caused by common eye fatigue?
The most reasonable protection for dry eye-artificial tears
Artificial tears mainly imitate natural tears. When eyes are dry, it can be used to relieve symptoms without any anti-inflammatory, anti-fatigue and anti-allergic ingredients.
As a first-line drug for the treatment of dry eye, artificial tears are the most important, which can supplement the tears lacking in the eyes, dilute the irritating or inflammatory media on the eye surface, and have a good therapeutic effect on dry eye.
Then choose artificial tears carefully! Try to choose preservatives-free.
There are more than ten kinds of preservatives commonly used in eye drops, among which benzalkonium chloride is the most common one, which is the most widely used now and has few side effects, but even so, it is not recommended to use it for a long time, and the side effects will accumulate slowly and leave seeds for future eye diseases.
So how do you know if there are preservatives in eye drops? Just look at the packaging!
At present, there are only two kinds of eye drops without preservatives on the market.
One is the one-time throwing sun type. There are many small packages in the box, and each small package can only be used within one day after opening, so it is called the Japanese-throwing type:
One is a large dose, which can be used for a long time, but the packaging is patented. There is only one way, one brand:
Through vacuum and some mechanical mechanisms, this kind of packaging can ensure that it can only go out and bacteria can't get in, so it can be stored for a long time without preservatives.
Other large-dose eye drops contain preservatives and various glass or plastic packages.
These two kinds of preservative-free packaging have their own advantages. The sky-throwing style is very portable, but the packaging cost is high. Unfortunately, it was used soon after opening the package. Because of the patented design, there is no competition in large packaging, but now it seems that the price is not very high, which is a conscience, but it may be inconvenient to carry. It is recommended to put it in the office or at home.
All the above are eye drops, but in any case, eye drops are only used to relieve eye fatigue. To fundamentally solve the problem of dry and itchy eyes, we must pay attention to protecting our eyes. Here are two methods I recommend to use again.
Active blinking
Normal adults blink a dozen times a minute, that is, every 2 to 6 seconds. By actively blinking, tears can be evenly distributed on the surface of the eyes, and the retina and eye muscles can be temporarily rested.
Computers often break down.
Watch the screen continuously for a long time, and set a rest time for yourself. For example, I'm taking a five-minute break at 1 hour.
You can get up and get a glass of water to the bathroom.
Go to the window to see the future and think about life.