What Are the Symptoms of Night Blindness?

Night blindness is commonly referred to as "bird blindfold", which is a medical term that refers to symptoms of poor visibility or completely invisible objects at night in dimly lit environments or at night, and difficulty in movement. The symptoms are usually due to a lack of vitamin A.

Chinese name: Night blindness
Commonly known: "Bird blindfolded"

Nature: Medical Terminology
the reason: Vitamin A deficiency

Diagnosis of night blindness

1. Ask for a detailed history, such as diet, fever, and long-term diarrhea.

2. Check the condition of the conjunctiva and cornea, pay attention to whether the conjunctiva is dry, wrinkled, Bitot spots, cornea is cloudy, softened or perforated.

3. Identify the cause of the decrease in dark adaptation and the cause of xerophthalmia, and if necessary, perform dark adaptation and retinal electrogram examination.

4. Check for systemic vitamin A deficiency and other vitamin deficiency symptoms.

Identification:

Differential from corneal and conjunctival desiccation

(1) The surface of the conjunctiva is dry, dull, and easily wrinkled, even as thick as the skin; the conjunctival blood vessels are blue, the cornea is dry and cloudy, and the perception is dull.

(2) Conscious dryness, burning, and severe vision loss.

(3) More common in adults.

Causes of night blindness

We understand the physiological processes of dark adaptation, and it is not difficult to understand night blindness. The root cause of night blindness is that the retinal rod-shaped cells lack the raw material to synthesize rhodopsin or the lesions of the rod-shaped cells themselves.

Classification of diseases

The causes of night blindness are as follows:

Night blindness

Due to the lack of vitamin A in the diet or the absorption of vitamin A due to certain digestive diseases, the retinal rod cells do not synthesize rhodopsin raw materials and cause night blindness. This night blindness is temporary. As long as you eat more pork liver, carrots, cod liver oil, etc., you can supplement the deficiency of vitamin A and will soon be cured.

Acquired night blindness

It is usually caused by dystrophy of the retinal rod-shaped cells or its own disease. It is common in diffuse choroiditis and extensive choroidal ischemia and atrophy. This kind of night blindness gradually improves with effective treatment and healing of the disease.

Congenital night blindness

Department of congenital hereditary eye diseases, such as retinal pigment degeneration, dysplasia of rod-shaped cells, lost the function of rhodopsin synthesis, so night blindness occurred.

Prevention of night blindness

1. It is not difficult to prevent night blindness. Eat more foods rich in vitamin A, such as eggs and animal livers.

2. First of all, nutrition should be arranged scientifically. Especially for infants and adolescents during development, food diversification should be promoted. In addition to staple foods, non-staple foods include fish, meat, eggs, beans, dairy products and animal offal, and fresh vegetables. .

3 For seriously ill patients, stay in bed quietly at night.

4 Supplement with vitamin A nutrients or carotene extract. Beta-carotene can be forwarded to vitamin A without side effects.

Night blindness food control

1. Eat apples often to prevent night blindness.

2. Fresh anchovies, washed, stewed anchovy soup, fish soup. (Fish is rich in vitamin A, which is most suitable for night blindness patients. It can prevent dry eye disease, night blindness and various keratitis).

3 60 to 90 grams of fresh spinach, 120 grams of pork liver, eat the same soup. Can improve vision, can cure night blindness, vision loss.

4 Pork liver, carrots, shallots and salt. Cook until liver is cooked and eat several times. Nourishing the liver and nourishing blood, clearing away heat and eyesight. With night blindness and pediatric squint.

5. 2 pairs of chicken livers, 15 grams of cereal millet, and 10 grams of yamingsha. Wash the chicken liver, put it in the pot with glutinous grass and Ye Mingsha, and add a little water to steam it. Eat liver juice. Clear heat, nourish blood and moisturize. Eating more effectively can cure night blindness, xerophthalmia, and pediatric eye sickness.

6. 150 grams of pheasant meat, 50 gu carrots, each cut into shreds. Heat the oil in a wok and stir-fry the shallots to produce the fragrance. Stir-fry the double wires, add the salt, soy sauce and other sauces and stir-fry. Liver eyesight, treatment of dazzle and night blindness caused by liver deficiency.

7. 150 grams of beef liver, 15 grams of Atractylodes sylvestris, drink a total of decoction. 1 dose daily, once in the morning and evening. Treatment of night blindness caused by lack of vitamin A.

8. 200 grams of pork liver, 150 grams of fresh wolfberry leaves, first wash the pig liver and cut into strips, cook with wolfberry leaves, drink soup and liver, 2 times a day. Yijing Liver, with night blindness, vision loss, has the effect of improving visual function.

9. 2 fresh rabbit livers, cut into slices, boiled and boiled until half cooked, then add 1 egg, season with a little salt and oil, cook and eat. Treat children with squinting and night blindness.

10 Slice 60 grams of lamb liver, stir fry with onion for a while, boil in a pot of water, add 100 grams of rice, cook until the rice blooms, and then cook the lamb liver. Eat porridge and liver, even for a few days. Tonify the liver and eyesight, increase vitamin A, D and calcium, has a significant effect on improving vision. Treat children with squinting and night blindness.

11. 100 grams of pork liver, wash and slice, add water, and cook the soup over low heat. After the liver is cooked, add 10 grams of tempeh, 2 onions, and beat 2 eggs after boiling. Drink soup and eat pork liver and eggs. It can be eaten often to nourish the liver. Can cure nutritional amblyopia and night blindness.

12. 1 rooster liver, 1 small cup of honey. Rooster liver is not washed with water and steamed with honey. Take 1 serving daily.

13. Cangshu 15 grams. Decoction, 1 dose daily for 3 days.

14. Pork liver and chives are appropriate. Both flavors are cooked together, without salt, and liver soup is effective.

15. 150 grams of red sweet potato leaves and 200 grams of goat liver. Wash and chop the sweet potato leaves, slice the goat liver, cook with water, eat liver soup, 1 dose daily for 3 days.

16. Wash the chicken liver decontamination film, place it in a bowl with the other 2 herbs, add a small amount of water to separate it from the water, and steam it. Multiple servings are effective.

17. Fresh rabbit liver 1-2, a little soy sauce. Sliced rabbit liver, cooked with water and dipped in soy sauce.

18. Pork liver, hulubu, and fresh ginger slices are in proper names. Add water and cook until the liver is cooked. Take it and eat it often.

Night Blind Diet Recipe

Night blindness refers to the inability to see objects or unclear objects in the dark at night or during the day, which is mainly caused by weakness of the spleen and stomach and fire gate failure. The night blindness of the weak spleen and stomach is more common in children, accompanied by symptoms such as large abdomen, thin yellow muscles, thin hair, normal vision during the day, and invisible things at night or in the dark. Life gate fire failure, at first, night blindness, gradually reduced vision, and accompanied by dizziness and weakness, chills and cold, eating incense, nocturnal emission impotence, white fur, thin weakness and other symptoms. In the treatment of vision loss and night blindness, the cause must first be identified before symptomatic treatment can work. The following dietary treatments can help treat vision loss:

Yanggan Wan:

It consists of 250 grams of Ye Mingsha, 120 grams of Angelica, 200 grams of Equisetum, 100 grams of cicada, and 500 grams of goat liver. It is made into honey pills, 10 grams each time, twice a day, suitable for various night blindness.

Chrysanthemum pills:

It consists of 100 grams of chrysanthemum, 30 grams of Morinda citrifolia, 100 grams of Cistanche deserticola, and 100 grams of wolfberry. It is made into honey pills, 10 grams each time, 3 times a day. Night blindness.

Wolfberry leaf pork liver soup:

Use 100 grams of wolfberry fresh leaves, 100 grams of pork liver, and soup to flavor each time. It can supplement deficiency of essence, expelling wind and eyesight, and is suitable for the treatment of night blindness and vision loss. Healthy people also eat regular food to prevent vision loss.

Cinnamon steamed chicken liver: (Cinnabar is highly toxic, use with caution)

Use 1 pair of chicken liver and 0.5 g of cinnabar each time.

Mix well, put it in a small bowl, add a little water, and steam the credit over water. It can be used daily or every other day. It has the effects of nourishing the liver, calming the mind, replenishing qi, and eyesight. It can help to treat night blindness and vision loss.

People with reduced vision and night blindness should eat more vitamin A-containing vegetables, eat more animal livers and eggs, avoid excessive fatigue, fast food that is irritating and hot, and do not drink or smoke.

In addition, those with normal vision can also take the above-mentioned medicated diet if they are engaged in industries with excessive eyesight to prevent vision loss.

A Night blindness lacks vitamin A

There are cone cells and slender rod-shaped cells on the retina of the human eye. Both of these cells have the same light-sensitive substance, rhodopsin.

Vitamin A-containing vegetables and fruits prevent night blindness The cone cell tube looks at the object during the day, and the slender rod-shaped cell tube looks at the object at night. The light-sensing substances in these two cells are actually proteins involved in vitamin A (retinol). The change in the structure of the protein causes the nerve impulse to flow into the brain to form an image, and rhodopsin itself "fades". If it enters the dark at this time, because rhodopsin disappears, the eye is not sensitive to light. At this time, Invisible objects. Under normal circumstances, there is enough vitamin A in the human body. Under the action of retina and liver enzymes, it promotes the regeneration of rhodopsin, restores the sensitivity to light, and enables people to see the shape of objects in the dark. If the body lacks vitamin A, the regeneration of rhodopsin is not only slow but incomplete. When a person enters the dark from the bright place, the object cannot be seen for a long time. We call this phenomenon the decline in dark adaptation (based on dark adaptation Ability can measure one's own vitamin A level), often due to the serious lack of vitamin A, rhodopsin cannot be regenerated, which is often referred to as "night Disease. " Some people describe that the human eye is like a precision camera, and the retina is like the negative film of a camera. It develops the information and light received by the eye, and finally forms vision in the brain. Vitamin A is the photosensitive material in the negative. When vitamin A is lacking, it is impossible to make the photo sensitive and produce vision, especially at night, because it consumes more vitamin A at night than during the day, it is called night blindness.

Vitamin A is a fat-soluble vitamin that is easily lacking in the dietary life of our people. It is often mixed with lipids in food. Vitamin A is heat-resistant and has very little cooking damage in a short period of time, but it is easily oxidized in the air and instead of physiological activity, it can also be destroyed by ultraviolet rays. Vitamin A is mainly derived from animal foods, such as the liver, egg yolk, and milk of various animals, which are rich in vitamin A. Carotene in plant foods is called provitamin A. Carotene is converted into vitamin A by carotenease in the human liver. The human body has a poor absorption and utilization rate of vitamin A. Generally, the absorption and utilization rate is 1/3 of the intake amount, and after absorption, it is only 1/2 of the absorption amount. It can be seen that the physiological value of carotene is only 1/6 of that of vitamin A. Foods rich in carotene are mainly orange-yellow and green vegetables, such as spinach, carrots, canola, amaranth, malan, etc., contain more than 14 mg of carotene per 500 grams, as long as you eat 120-150 grams per day to meet children's vitamin A Need. Contains 1.5-7.4 mg of carotene per 500 grams of scallion, pak choi, tomatoes, bell peppers, etc. Because vitamin A and carotene are fat-soluble, ingesting a certain amount of fat at each meal can promote the absorption of vitamin A and carotene.

The recommended amount of vitamin A for adults in China is 800 micrograms of retinol equivalent for men and 700 micrograms of retinol equivalent for women.

Special reminders of friends who use too much eyes, especially those who watch TV and use computers for a long time at night, should pay attention to the use of eyes at night consumes more vitamin A than during the day. If you do not pay attention to intake of vitamin A from your diet, Vision has an impact, and there may be more.

Classification of night blindness

Chinese medicine treatment of night blindness

Chinese medicine believes that night blindness is the main evidence and identified it as "high wind sparrow". It was published in an ancient book of Chinese medicine ophthalmology as early as 1345 AD. As "retinal pigment degeneration" as early as 512 years.

Night blindness is a hereditary, progressive, chronic eye disease that occurs most often in children of close relatives who marry. It occurs more frequently between the ages of 10 and 20 years, often in both eyes, and more in men than women. Several people in the family suffer from the disease. If it occurs in old age, the progress is slow; the sooner it occurs, the faster the progress, the poor after treatment, and eventually blindness.

The clinical manifestations of night blindness are early blindness, that is, things can be seen during the day, and things are not clear at night. The visual field gradually narrowed in the early stage, and a tubular visual field was formed in the late stage. Only the front central part was seen, and the surrounding parts were invisible.

Night Blind Eyeball Image Fundus examination: Initially, osteocyte-like pigments piled up in the peripheral part of the retina, then gradually spread to the central part, and finally spread to the macula and became blind.

In terms of treatment, night blindness is a difficult fundus disease in ophthalmology. At present, there is no good way for western medicine. Chinese contemporary Chinese ophthalmologists such as Chen Dafu, Pang Zanxiang, Yao Heqing, Cao Renfang, Lu Nanshan, Yao Fangwei, etc., think that Chinese medicine treats night blindness in the early stage. Easy to treat, difficult to treat later. However, as long as the treatment is based on syndrome differentiation, Chinese medicine and acupuncture can control the deterioration and improvement of night blindness and even cure it.

On the 14th of this month, I was invited by the Malaysian Institute of Medicine to the auditorium of Kuala Lumpur's hospital to publish a study report on the treatment of 8 cases of night blindness. Attendees included nearly 100 western medical ophthalmologists. Later, I discussed with them how to treat them. This disease.

The acupuncture points for treating 8 cases of night blindness are as follows:

First, the treatment of eyesight is gradually atrophic, take the three needles located on the head, or Baihui acupoints to the eye window acupoints, and then add electric acupuncture for 30 minutes.

Second, the treatment field of vision is gradually narrowing, take the eye window point towards the silk bamboo hole, and then use the silk bamboo hole to penetrate to the pupil Ziya point, and then add electric acupuncture for 30 minutes.

3. Acupoints: Liangdian, Blind, Qingming, Dongming, Zhengming, Wanli, Touguangming and Zuguangming.

Observation of curative effect after needle:

There were 6 cases of improved vision, with vision ranging from 0.2 to 1.5.

There were 5 cases with improved visual field, and the visual field was enlarged from 90 degrees to 135 degrees.

Of the 8 clinical observations, a total of 2 cases were markedly effective, 3 cases were effective, and 2 cases were ineffective. The total effective rate was 62.5%.

In conclusion, acupuncture is definitely effective in treating night blindness.

Chinese and Western medicine's views on night blindness: Western medicine considers night blindness to be an incurable disease; and after treatment with acupuncture or traditional Chinese medicine, Chinese medicine has a significant effect, and night blindness is definitely a treatable disease. It also opens a bright path for patients with night blindness, which is worth promoting .

Night blindness western medicine treatment

Quickly replenish a large amount of vitamin A during treatment, take cod liver oil or point the eye with vitamin A. Prevent eye infections. Close your eyelids. Severe cases should be sent to hospital for rescue in time.

Note: Although night blindness is often caused by a lack of VitA, VitA supplementation must be performed under the guidance of a doctor. Overdose may cause VitA poisoning.

Congenital night blindness

Congenital resting blindness is an autosomal dominant or recessive eye disease. There is no abnormality in vision, visual field, and fundus, but dark adaptation is reduced and the time is prolonged. Night blindness symptoms can occur after birth. It grows and gets worse without special treatment. Congenital progressive night blindness is often concurrent with other hereditary retinal disorders, such as primary retinal pigment degeneration, and its dark adaptive function decreases with the progress of the disease, accompanied by changes in vision, visual field, and fundus. There is currently no specific treatment. means.

Acquired night blindness

Acquired night blindness is caused by acquired systemic disease or eye disease, and has nothing to do with genetics. It is found in vitamin A deficiency, liver disease, hyperthyroidism, advanced glaucoma, high myopia, optic nerve atrophy, and mild retinal choroidal atrophy. Different treatments can be given for the cause. .

Night blindness medical research

After 13 years of research, researchers at the University of Calgary and the University of Victoria in Canada have discovered the NYX variant gene that causes night blindness. Toban Baker Hanson, a famous Canadian ophthalmologist who taught at the University of Calgary, recently revealed that after analyzing 22 families with a genetic history of night blindness in North America and Europe, they concluded that mutations in the NYX gene are a common cause of night blindness. the reason.

Researchers have discovered that the normal NYX gene produces a protein whose role is to send light changes to retinal nerve cells. When the NY X gene is mutated, the protein it produces no longer functions normally, resulting in disturbances in night-time optical signal transmission of retinal nerve cells, which causes night blindness.

Researchers believe that the above findings not only explain why some people are born with night blindness, but also bring hope to radical cure of night blindness.