floaters
Introduction
Introduction to flying mosquitoes Flying mosquitoes are small black shadows that flutter in front of the eyes. Especially when the white background is bright, the symptoms are more obvious. It may also be accompanied by a flashing feeling. Generally, it is caused by the degeneration of the vitreous body. It is a natural aging phenomenon, that is, As the age ages, the vitreous will liquefy and produce some turbidity. Thus, the official name of the mosquito is "vitreous chaos" or "vitreous float". Flying mosquitoes are produced by the projection of opaque objects in the vitreous on the retina. It is more noticeable when the light is bright or against a white background. Sensitive people can even paint their various shapes. Many floating mosquitoes exist for a long time, do not change all the year round, do not affect vision, and there are no eye lesions after examination. There is not much clinical importance, and there is no need to worry. Some elderly people suddenly have one or two black shadows in front of their eyes without other symptoms, often due to the detachment of the posterior membrane of the vitreous, and generally there is no major harm. However, if a large number of black spots suddenly appear, it should be thought that retinal vascular rupture or retinal tear formation may be a precursor to retinal detachment, and the fundus should be further examined in detail. In choroiditis, many types of cells or exudates can enter the vitreous body, which is also a common cause of pathological floaters, but it is often difficult to detect because of visual impairment. The floating mosquitoes felt by myopia patients are often associated with vitreous liquefaction. basic knowledge The proportion of illness: 0.001% Susceptible people: more common in people over 40 years old Mode of infection: non-infectious Complications: vitreous hemorrhage
Cause
The cause of mosquitoes
Cause:
Flying mosquitoes are symptoms of vitreous opacity and are generally caused by vitreous degeneration. Vitreous liquefaction and posterior detachment are the main causes of floaters, which are caused by about 70% of patients, but about 1/4 may have pathological signs that threaten vision, of which retinal tears are important. Chinese medicine believes that the disease is mostly liver, gallbladder, and kidney. Insufficient liver and kidney blood, lack of water; or excessive blood loss, blood deficiency and heat; or sadness and anger, liver fire inflammation; or fever, yin, loss of true yin; or bloody phlegm, blood stasis Or wet heat transfer, turbidity on the pan; or phlegm dampness, clearing the stagnation and other evidence, each susceptible. It is also prone to mosquitoes after a serious illness.
Prevention
Mosquito prevention
1. Have enough vitamins. Animal liver, eggs, dried beans, meat, mushrooms, fresh vegetables and fruits all contain large amounts of vitamins and should be eaten more.
2. Eat more seafood, unrefined grains, and fish food. These foods are very helpful for the eyes, because they contain many minerals such as zinc and selenium, which can alleviate eye fatigue and prevent vision loss.
In terms of the pathogenesis of mosquitoes, vitreous degradation is associated with intense light exposure. Experts say that wearing sunglasses has a protective effect on the lens, vitreous and retina, but the choice of sunglasses should be used under the guidance of a doctor. In addition, prevention of myopia is another possible factor in delaying vitreous degradation.
Complication
Flying mosquito complications Complications vitreous hemorrhage
Pathological floaters can suggest the following diseases:
Retinal tear film
Due to the posterior vitreous detachment and other reasons, there may be a hole in the retina, and the liquefied vitreous penetrates into the hole, resulting in retinal detachment. Therefore, the initial symptom of retinal detachment is a sharp increase in the number of "floaters" in front of the eye. For this pathological floater, if left unchecked, it will lead to blindness. In general, the treatment of retinal tears can use a laser to coagulate the periphery of the hole (laser coagulation) to prevent retinal detachment. This treatment can be treated in an outpatient setting; if retinal detachment has occurred, it must be hospitalized and surgically treated.
Vitreous bleeding
Diabetes, high blood pressure, and trauma can cause retinal hemorrhage. At this time, once the blood enters the vitreous body, it suddenly feels the symptoms of flying mosquitoes or the feeling of pulling a red curtain in front of the eyes. Due to the amount of bleeding and the location, it can cause varying degrees of visual loss. In this case, if there is less bleeding, it can be self-healing, and it is generally treated with a hemostatic drug and a drug that promotes blood absorption. However, depending on the condition, laser and surgery can also be used.
Uveitis
Once bacteria or viruses enter the uvea, inflammation occurs in the eye due to allergic reactions. At this time, white blood cells and exudates will enter the vitreous from the blood vessels, causing symptoms of flying mosquitoes. When the inflammation is aggravated, the "float" increases and the vision decreases. Anti-inflammatory internal medicine or eye drops can generally be used for treatment.
Many floating mosquitoes exist for a long time, do not change all the year round, do not affect vision, and have no organic lesions of the eye after examination. There is not much clinical importance, and there is no need to worry. Some elderly people suddenly have one or two black shadows in front of their eyes without other symptoms, often due to the detachment of the posterior membrane of the vitreous, and generally there is no major harm. However, if a large number of black spots suddenly appear, it should be thought that retinal vascular rupture or retinal tear formation may be a precursor to retinal detachment, and the fundus should be further examined in detail. In choroiditis, many types of cells or exudates can enter the vitreous body, which is also a common cause of pathological floaters, but it is often difficult to detect because of visual impairment. The floating mosquitoes felt by myopia patients are often associated with vitreous liquefaction.
Symptom
Symptoms of flying mosquitoes Common symptoms Non-vitreous lesions... Abnormal flash in front of eyes, white visual field defect
Some people go to the ophthalmology to see a doctor, claiming that they often see black spots shaking in front of their eyes, sometimes flashing past the eyes, sometimes not gathering. The shape changes from time to time. When a patient looks at a brighter background such as a blue sky or a white wall, it is easier to find it. Because the symptom of this disease is that the black spots appearing in front of the patient's eyes will fly around with the rotation of the eyeballs, and they will never catch or catch them. It is like a flying mosquito, which is medically called a mosquito.
The mosquitoes are very special and quite common in eye diseases. Most of the middle-aged and older people over the age of 40 have such symptoms. Patients with high myopia, those who have undergone cataract surgery, and other patients with intraocular inflammation or retinal vasculopathy may also develop this disease.
The following summarizes the dangerous symptoms of several mosquitoes:
(1) There is an abnormal flash.
(2) The number of flying mosquitoes is increasing in a short time.
(3) The line of sight has a feeling of being blocked.
Because a few mosquitoes are a symptom of serious diseases, experts believe that if you find a group of flying mosquitoes in front of you, you should first do a specialist examination. After the examination, if there is a serious eye disease, you should treat it.
Examine
Mosquito check
For patients complaining of flying mosquitoes, the fundus should be examined carefully, including a facet mirror.
Diagnosis
Identification of mosquitoes
It can be diagnosed according to the clinical.
1. Some people go to the ophthalmology clinic, claiming that they often see black spots shaking in front of their eyes, sometimes flashing past the eyes, sometimes not gathering. The shape changes from time to time. When a patient looks at a brighter background such as a blue sky or a white wall, it is easier to find it. Because the symptom of this disease is that the black spots appearing in front of the patient's eyes will fly around with the rotation of the eyeballs, and they will never catch or catch them. It is like a flying mosquito, which is medically called a mosquito.
2, floaters are very special and very common in eye diseases, middle-aged and older people over the age of 40 have such symptoms. Patients with high myopia, those who have undergone cataract surgery, and other patients with intraocular inflammation or retinal vasculopathy may also develop this disease.
