How can I adjust my visual acuity from 1 0 to 1 2? May I?

Normal, is very good vision.

Near vision chart. At a distance of 33 cm from the eye chart, those who can clearly see "the visual target is normal." It is also possible to allow the patient to change the examination distance, i.e. to hold the eye chart closer or farther away to make it clearly recognizable, so as to measure the best visual acuity and estimate the refractive properties and power of the patient.

Therefore, near vision examination can understand the adjustment ability of the eye, and in conjunction with distance vision examination, it can preliminarily diagnose whether there is refractive error (including astigmatism, myopia, farsightedness) and presbyopia, or whether there are organic lesions, such as cataracts, fundus lesions, etc.

If children over 8 years old only have vision, they should pay attention to it, check their eyesight, and pay attention to their eye habits and posture.

Hello, your eyesight is normal, if you are an adult, congratulations, your eyesight protection is exceptional! However, it is also necessary to pay attention to eye habits and try to avoid eye fatigue.

The eyesight is much better than the eyesight.

Don't look at the computer or TV or other monitors when you have nothing to do, don't read a book while lying down, read a book in direct sunlight, don't do a car, read a book while eating, play with your mobile phone, etc.

Do eye exercises regularly, you are pseudomyopia, the main protection, you will definitely be able to get better

It's usually pseudomyopia, and I also had this situation when I was in junior high school. After my dad found out, he bought me eye drops, drops before going to bed, and pay attention to eye hygiene, not to overuse eyes, pay attention to rest, and eat more carrots, which are all helpful.

If you have myopia, you can't restore your original vision unless you go for an excimer laser, and you can only delay the deepening of your eyes by taking care of your eyes. To effectively maintain your eyes, you can refer to the following two points:

1) Among the key points of vision care, the main thing is to "don't look at it for a long time" - watching TV, playing on the computer, etc., because there is radiation, so the time should not be too long. In addition, overuse of the eyes can cause eye fatigue and cause the refractive power of myopia patients to deepen. You can usually do more eye movements, such as:

Rotate up and down, looking left and right, to relax the eye muscles. Warm compresses are also effective and quickly eliminate eye fatigue. You can also rub the palms of both hands until hot, and then apply it to the eye area to promote blood circulation in the eye area.

2) In terms of diet, food supplements can be appropriately carried out: meat of pigs, cattle, sheep, chickens and other animals; sea cucumbers, yellow croaker, eels and other fish; pig liver, chicken liver and other animal livers; Others such as longan, lychee, carrot, celery, yam, sesame, wolfberry, chrysanthemum, cassia and so on. And eat less spicy foods such as onions, garlic, leeks, pepper, wine, and chili peppers.

As for surgery, LASIK is currently the mainstream surgery for refractive problems in China. It has relatively strict indications and contraindications, and surgery is generally not considered under 18 years old, and some doctors extend the scale to 20 years old.

LASIK is favored by doctors because of its light response after surgery, fast vision recovery (you can use your eyes immediately after surgery and return to normal vision after a few hours), and stable results, fast and convenient (you can move normally on the same day after surgery, without affecting your life and work).

However, as long as it is an operation, no matter how big or small, there is a certain risk, and theoretically the infection caused by improper treatment can seriously affect vision, but we have never seen a similar example in our hospital so far. In addition, irregular astigmatism and night glare may be common after surgery. Generally, at least 18 years old, myopia within 1500 degrees, farsightedness within 600 degrees, astigmatism within 600 degrees, myopia in the past two years is stable, and there is no eye lesion at this stage can consider surgery ..

The above vision is normal vision, but the eye is better than the right eye when looking far.

The analysis is as follows: 1. The visual acuity conversion table, that is, 20 20.

2. Under normal vision, an object at an angle of 1 minute (1 60 degrees) is imaged on the retina as 2 to 4 microns, roughly equivalent to the diameter of a cone. Generally speaking, normal vision is written as a decimal. The equivalent is the imperial 20 20, which means that the person can see clearly from 20 feet away, and a person with normal vision can see at 20 feet away - this meaning does not look like a human ......

3. In fact, the thing of vision is much clearer to explain from perspective, to distinguish two points, there must be at least one non-excited cone between the two excitatory cones where the imaging is located, otherwise the overlapping of the two images will not be distinguishable. A typical eye chart is seen from a distance of 20 feet (6 meters) and is equivalent to a 5-minute viewing angle, or about 1 centimeter. This decimal also means that the smallest resolution angle is around 1 minute angle.

4. In fact, eyesight, that is, the person's ability to distinguish perspectives is about 1 = 2 minutes, which is twice as bad as that of a person with normal vision. In this way, we can see that in fact (20 80, 6 24) people with vision are twice as bad as people with eyesight, but the decimal and ratio is only reduced, and this decimal representation does not intuitively compare the difference in vision.

5. This fraction indicates that 20 20 is the imperial system, and the equivalent SI unit is expressed as 6 6 (that is, 20 feet is replaced by 6 meters). The score of visual acuity is expressed as 20 40, or 6 12, which means that the guy is standing 6 meters away and can only see clearly what a person with normal vision can see from 12 meters away.