What is the standard visual acuity for adults

Near and far with standard visual acuity is.

People's normal vision is generally normal vision, according to the standard eye chart, however, the situation of vision at different ages is also different, in daily life, we should pay attention to the protection of vision, especially do not overuse the eyes, pay attention to eye hygiene, do not let the eyes appear tired, appropriate eye exercises, is also good for vision.

Normal is the logarithmic eye chart in China, and normal is , which is the new eye chart that is now commonly used.

To prevent myopia, we must learn to use our eyes scientifically, read and write in a correct posture, keep the distance between our eyes and books about one square foot, and read books continuously for no more than one hour, and look at the distance or look at green plants every once in a while. Do more eye exercises during breaks, eat more carrots, apples, bananas, cuttlefish, eggs and other foods, and take a walk or exercise outdoors in your spare time.

Children under the age of 18 are myopic and can recover from timely treatment after myopia due to their strong adjustment of the eyeball. It is recommended to take Joy Vision Nutrients, myopia can recover quickly, and the younger the better. You only need to take one sachet twice a day, with warm water, and stick to it for a period of time.

A normal adult should have visual acuity of or above. If you do find that eye vision or near vision has declined, then you should choose a regular hospital for ophthalmology examination vision, refraction, slit lamp, intraocular pressure and fundus, first find **and then reasonable**, usually pay attention to rest, reasonable use of eyes, control the use of mobile phones, computers and other fine eyes, see more distance, exercise more, such as walking, playing ball, etc., you can often do hot compresses for the eyes, eye exercises, and take good care of your eyes.

Generally speaking, the eyes are said to be a little bit, the eyes are the best, normal, 1The eyes are also normal, but they are not so good, and those below 1 point can be called myopia, and the above are generally called farsightedness. The 100 degrees that the landlord said is the approximate eye, so the glasses need to be worn, but the general 100 degree glasses are fearless without wearing, and have no impact on daily life, so it is best not to wear them, because the more you wear them, the more myopia you may have.

150-degree glasses are worn by people with left and right eyes, and it is best for such people to wear glasses when reading and studying, and even more so when looking at the blackboard!

What is the standard of normal vision Many people think that as long as the vision can reach 1 0 or more, it is considered normal. In fact, a visual acuity of 1 0 can only indicate that a person's partial vision is normal. Criteria for normal vision also include:

1. Central visual acuity refers to the visual acuity determined by people usually looking at the eye chart, including distance visual acuity (looking at the eye chart from 5 meters away) and near visual acuity (at 30 percent.

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The normal value of the eye power is 1 0, and the normal eye power is about 100 degrees.

1. Generally, myopia within 300 degrees is called mild myopia, 300 600 degrees is called moderate myopia, and above 600 degrees is called high myopia.

2. Usually the visual acuity of 1 0 or 5 0 is normal vision, higher than these two standards are good vision, and less than 4 8 are myopic eyes.

The main causes and pathogenesis of myopia:

1) About 85 myopia is related to nearsightedness (such as reading books, watching TV, watching computers, i.e., myopia three looks) and can be prevented;

2) About 15 myopia is related to the elongation of the eye axis with growth, which is controlled by factors such as congenital variation or genetics, and the effect is poor. It can be seen that juvenile myopia is an eye disease that can be prevented.

In the past, the correct artificial degree was normal enough, but now it is changed to correct vision is the standard normal and regarded as normal.

Normal people's vision is probably above, patients suffering from myopia can see near objects more clearly and can not see distant objects clearly, then the light will focus in front of the retina, which is due to the eye is too long, or the lens system focusing ability is too strong, the vision can only indicate that part of the person's vision is normal, strictly speaking, the standard of normal vision also includes central vision, peripheral vision, stereopharia.

According to the standard eye chart, children over 8 years old generally have normal unaided visual acuity. If you have refractive error, corrected visual acuity should be achieved after correcting myopia, farsightedness, and astigmatism. However, children aged 0-8 years old will gradually have better eyesight, and the standard of vision will be different.

The average visual acuity of a 3-year-old child is around the same and generally cannot be lower, while the visual acuity of a 5-year-old child cannot be lower.

A score of 0 5 indicates the grade of visual acuity. A score of 0 indicates no light perception; 1 point indicates light-sensitive hail dust; 2 points for manual; Three points of table 50cm

Manual; It can be measured by the approach method (Table 2--1); The visual acuity range can be measured by placing it at a distance of 5 meters on the eye chart. Normal vision. When the hole is recorded, the visual acuity of the smallest line of the visual target seen by the eye is recorded according to the 5-point recording method.

Our normal human eye distance vision is what needs to be achieved. If you wear glasses, the general correction range is to.