Presbyopia, or presbyopia, is a physiological phenomenon, not a pathological state or ametropia, and it is an inevitable vision problem after people enter middle-aged and elderly people. This is one of the signs that the body is beginning to age. With the increase of age, the lens of eyeball gradually becomes hard and thick, and the adjustment ability of eye muscles also decreases, which leads to the decrease of zoom ability. Therefore, when looking at a close-up object, because the image cannot be fully focused when projected on the retina, the close-up object will become blurred.

This physiological vision adjustment function is weakened with age. Presbyopia, commonly known as presbyopia, probably begins at the age of 40-50.

What are the manifestations of presbyopia?

1, it is difficult to see near objects. The main performance is the difficulty in reading books and newspapers. This phenomenon becomes more and more serious with the growth of age, even if you put the goal far away, you can't see it clearly.

2. Reading needs stronger lighting. Because only enough light can narrow the pupil, increase the depth of field and improve vision.

3. It is particularly easy to get tired with eyes. Due to the weakening of adjustment ability, the elderly need to work close to the limit of binocular adjustment, so it can't last long. This excessive adjustment will also make the eyes focus too much on the center, that is, they will be close to the eyes, which will easily lead to the old people reading newspapers in series and in pairs, and finally they can't stand it. Some people even have eye swelling, tears, headaches and other discomfort.

What method can prevent presbyopia?

Presbyopia is a normal phenomenon of aging, and there is no way to stop it. However, all methods that can delay aging can delay the formation of presbyopia, such as supplementing various vitamins, strengthening exercise, strengthening physical fitness, cultivating a good lifestyle, good reading habits and eye hygiene.

In addition to a pair of qualified reading glasses, we usually pay attention to giving our eyes maximum rest and eating some food that is very good for our eyes.

1, carrot

The relationship between carrot and eyes mainly comes from its carotene, because carotene can be converted into vitamin A in human body, and vitamin A is of great help to the eyesight of eyes, especially in the case of dark light and rapid light change, only the participation of vitamin A can be successfully completed. Nowadays, people often stare at computers, watch TV and play games, at this time, they consume a lot of vitamin A, and many people will feel dry eyes. If they lack vitamin A in their diet, they will have this bad feeling, so they should.

Of course, foods similar to carrots include pumpkins, broccoli, corn and blueberries. These foods contain a lot of lutein.

2, medlar chrysanthemum tea

Lycium barbarum chrysanthemum tea, which is brewed by adding Lycium barbarum into chrysanthemum tea, has the effects of expelling wind, clearing away heat, detoxifying and improving eyesight, and has obvious curative effects on chest tightness, palpitation, shortness of breath, dizziness, headache, numbness of limbs and other symptoms. Because both of them are medicinal materials for eye protection, they can effectively relieve the symptoms of eye fatigue or dry eyes.

Lycium barbarum contains 14 amino acids and a lot of carotene, and also contains betaine, nicotine, taurine, vitamin B 1, calcium, phosphorus, iron and other substances. Modern medical research has proved that Lycium barbarum can not only be used to prevent and treat diabetes, hyperlipidemia, liver diseases and tumors, but also has special medicinal value to prevent and treat eye diseases. A large amount of carotene contained in Lycium barbarum can be converted into vitamin A under the action of enzymes. Vitamin A has always been called a special vitamin to protect eyes and prevent vision degradation. It can be seen that Lycium barbarum has a strong effect on fitness and eyesight. It also has a good effect on treating blurred eyes and decreased vision.

This is very simple. Just soak a little in a cup every day. Of course, you don't mind people saying that you started to take a thermos cup and add wolfberry before middle age.

3. Egg yolk

Egg yolk contains lutein and zeaxanthin. These two substances have strong antioxidant effects, especially protecting eyes, which can reduce the damage of ultraviolet rays to eyes, delay eye aging and prevent eye diseases such as macular degeneration and cataract.

4, the internal organs of animals

Animal viscera contains a lot of vitamin A, which plays an important role in the development of children's vision. It is involved in the synthesis of rhodopsin in retina. If vitamin A is insufficient, it may lead to night blindness. In addition, calcium and trace elements selenium, zinc and chromium play an important role in the development of vision, so eating animal offal occasionally is good for eyes. But remember to eat in moderation. Many animals have very high cholesterol and eat too much.

5. Macroalgae

Kelp contains 1/3 mannitol in addition to iodine. There is a thick layer of "frost" on the surface of dried kelp, which is mannitol in kelp. Mannitol has diuretic effect, which can reduce intraocular pressure and has a good effect on the treatment of acute glaucoma.