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Dazzling, commonly known as presbyopia, is a decrease in the ability of the ciliary muscle, which regulates the tightness of the lens, to the eyeball. In fact, this is very easy to understand, the ciliary muscle is like an elastic band, which can be loose and tight. When we are young, the elastic band has a strong ability to adjust, so we can adjust our lens, make it thicker and thinner, just like a camera, it is a zoom, and you can see it clearly from near and far; After the age of 45, the elasticity of the muscles decreases, and the ability to exercise decreases, so when you look far and near, its conditioning state decreases.
Generally speaking, when we look at a distance, that is, when we are 5 meters away, we do not need the ciliary muscle to adjust; The ciliary muscles are only needed to exert force when looking close, so when the accommodative force decreases, the main manifestation of presbyopia is that it is not clear to see closely. We can see a lot of 50-year-olds who may like to put their hands far away and hold things far away when they look close; There are also some people who are short-sighted, he likes to his glasses, and he can see near things clearly without glasses, which is the manifestation of presbyopia. Presbyopia is actually a manifestation of the body's natural aging, which everyone encounters, whether it is myopic or normal eyes.
If this person has good eyesight since childhood, and I have eyesight, such a person will have presbyopia at an early age, he may be in his 30s, and he will be presbyopia at the age of almost 40. People who are short-sighted are not presbyopia, but people who are short-sighted can offset part of it slightly when they don't wear glasses, so people with myopia will also have presbyopia. If it is a person with low myopia, such as two or three, he may not need to wear glasses, but he needs to take off his glasses when he looks close; If he is six or seven short-sighted, he may need two pairs of glasses, one pair of glasses for six or seven to see far, and one pair of glasses for three or four to see close.
Therefore, different groups of people generally appear presbyopia after the age of 45 or after the age of 50, which is an inevitable process of natural age.
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Disease ** element. Refractive error, farsightedness, myopia lead to dazzling, and the farsighted eye appears to be dazzled earlier than the myopic eye.
Non-disease ** element.
2.Physical fitness: People of low height are more likely to be dazzled than people who are tall.
3.Location: The closer people are to the equator, the more likely they are to be dazzled.
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Most of them are due to aging and degeneration.
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There are many reasons for dizziness, so people with dizziness should go to the hospital for a comprehensive examination in time to find out the diseases that cause dazzle, and be targeted**.
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There are a lot of factors! Everyone's physical condition is different!
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1. Eye diseases.
Keratitis, optic neuritis, glaucoma, uveitis, cataract, age-related macular degeneration, retinitis pigmentosa, etc.
2. Brain diseases.
Such as brain tumors, cerebral atherosclerosis, etc.
3. Eye fatigue.
Excessive use of the eyes for a long time can cause eye fatigue, and dizziness can also occur.
4. Miscellaneous. Such as orthostatic hypotension, hypoglycemia, etc.
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Dazzling is caused by insufficient blood supply after squatting for a long time, and some are caused by anemia.
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1. Visual fatigue is a common ophthalmic disease, which is usually caused by excessive contraction and spasm of the ciliary muscle inside the eyeball caused by long-term close eye use. Eye fatigue is more common in middle-aged and elderly patients, and its main manifestations are easy to see things, and symptoms such as eye soreness, eye redness, dizziness and even nausea appear after close use.
2. People with refractive error or presbyopia need to overuse the adjustment of the eye when seeing, and the ciliary muscle cannot be able to do this job for a long time, so symptoms such as visual fatigue and dazzle occur. As a result, people with refractive error or uncorrected presbyopia are prone to eye dazzle.
3. Eye fatigue needs to reduce the time of near eye use, try to look at mobile phones, TV, computers, and do eye adjustment function training, such as flip shooting training. Patients with refractive error and presbyopia need to correct the refractive error, and can wear reading glasses when looking at near scenes, and myopia glasses when looking far away to relieve visual fatigue.
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Nowadays, more and more people in life will have dizziness due to life pressure and various reasons, which seriously affects people's living standards.
1.Reason 1: Poor diet, damage to the spleen and stomach, weakness of the spleen and stomach, no source of qi and blood biochemistry, lack of nourishment and dizziness in Qi Chun Peng; Or they are addicted to alcohol and fat, hungry and tired, hurt the spleen and stomach, and lose their good luck, so that the water valley does not turn into subtlety, accumulates dampness and produces phlegm, phlegm and dampness are obstructed, and turbidity and yin do not fall, causing dizziness.
Reason 2: Nervous system lesions: such as cerebral ischemic lesions, cerebellar lesions, brain lesions, traumatic brain injuries, some types of epilepsy, etc.
In addition, patients with autonomic dysfunction and certain neurological disorders often experience dizziness. Sometimes a cold may be accompanied by symptoms of dizziness.
3.Reason 3: In a healthy state, the presence of hematopoietic tissues and the quality and quantity of hematopoietic tissue in the elderly have declined, and the aging of red blood cells themselves makes their utilization rate of iron much worse than before. Therefore, if the elderly do not pay attention to nutritional care, they are prone to anemia.
Precautions. The above are the common causes of dizziness and dizziness, but once you find that there is a phenomenon of dizziness and dizziness, you need to actively find it**.
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5. The temperature of the area where the nucleus is located will be closely related to the crystal, and if the temperature is relatively high, the regulatory function of the crystal will be directly affected, so people living near the equator will have presbyopia earlier.
6. For example, congenital flat lens, congenital flat cornea, etc., there are also corneal trauma that causes the phenomenon of old people making eyes; In addition, due to aqueous humor, the lens refractive index is reduced and the vitreous refractive index is increased, which can also cause presbyopia, which is more common in the elderly and diabetic population.
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Hello! It is considered to be caused by low blood pressure, and mild symptoms of the condition may include: dizziness, headache, loss of appetite, fatigue, paleness, indigestion, motion sickness, etc.; Severe symptoms include:
Orthostatic vertigo, cold extremities, palpitations, dyspnea, ataxia, slurred speech, and even fainting, requiring prolonged bed rest. Patients with mild hypotension who do not have any symptoms do not need medication**. The main thing is to actively participate in physical exercise, improve physical fitness, increase nutrition, drink more water, eat more soup, and eat slightly more salt per day than ordinary people.
This paragraph] hypotensive diet.
Appropriate: Meat and vegetarian combinations. Longan, lotus seeds, jujubes, mulberries, etc., have the function of strengthening the mind and nourishing the brain, and should be eaten regularly to enhance physical fitness; For hypotension caused by blood loss and menorrhagia, it is important to eat foods that provide hematopoietic raw materials, such as foods rich in protein, copper, and iron, such as liver, fish, milk, eggs, legumes, and iron-rich vegetables and fruits, which can help correct anemia.
Patients with low blood pressure should choose a diet with high sodium (12 15 grams of salt per day), high cholesterol, such as animal brain, liver, egg yolk, cream, caviar, etc., so that the blood volume increases, the cardiac output also increases, the arterial tension increases, and the blood pressure will rise.
Avoid eating raw, cold, and air-breaking foods, such as spinach, radish, celery, cold drinks, etc. Don't eat corn and other foods that lower blood pressure!
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