What is the normal visual acuity for elementary school students, and what is normal for standard vis

Normal visual acuity for elementary school students should be above.

It is generally believed that the vision of a six-year-old child is normal vision, and the vision of a child over seven years old should reach above, and at least after the age of eight, this is the normal vision range.

, are all within the normal range, habits determine everything, and good habits are really good.

Visual acuity standards for primary school students: Normal unaided visual acuity or corrected visual acuity of primary school students reaching the international standard eye chart or above is normal.

Visual acuity refers to the ability of the retina to distinguish images. However, when the refractive medium of the eye (such as cornea, lens, vitreous, etc.) becomes cloudy or there is refractive error (including myopia, farsightedness, astigmatism, etc.), the vision of the eye with good retinal function will still decrease. The refractive medium of the eye is cloudy and can be surgically corrected, while the refractive error needs to be corrected with a lens.

Hello, the vision of the left and right eyes of normal elementary school students should be reached.

Normal vision for elementary school students should be, right? If you usually feel that you can't see clearly, you can go to a special eye hospital to check your eyes to see if you have myopia.

Elementary school students are both naked vision, and of course, myopia is inevitable in the fifth and sixth grades.

Elementary school students generally have normal visual acuity, but if their visual acuity is lower, it is usually considered that there may be refractive error and amblyopia.

Visual acuity refers to the ability of the retina to distinguish images. The quality of vision is determined by the ability of the retina to distinguish images, but when the refractive medium of the eye becomes cloudy or there is a refractive error, vision can still be reduced even in a well-functioning retinal eye.

Vision can vary greatly, both good and bad.

You ask students what is the standard for normal vision? Normal visual acuity is monocular and normal vision is bicular.

The eyesight of infants and young children is to follow the rotation of the eyeball, a one-month-old baby can actively look at the surrounding targets, a three-month-old baby can look at the fingers with both eyes, can see the general outline of the mother, but can not distinguish the eyebrows and eyes, one-year-old children can see the vision of the largest letters, three-year-old children can go on the eye chart, about to. Four-year-old children have close to normal vision, five-year-old children are, and six-year-olds have near-normal vision. The last time I took the baby to lead the optometry, there was a child who was six years old and could see that the optometrist said that this was not very good, and his farsightedness reserve value was consumed early;

A: Normal vision is normal, but it is difficult for children nowadays to meet this standard.

4 The lower limit of normal visual acuity for children aged 5 years is and the lower limit of normal visual acuity for children aged 6 and 7 years and above is.

If your child's visual acuity is lower than the lower limit of normal visual acuity for children of the same age, or if the difference in visual acuity between the two eyes is more than 2 lines, it means that the child's vision is abnormal and should be checked in time. However, vision is only an indicator of visual function, including stereoscopic vision, eye position, etc., when these problems exist, even if the vision is normal, it is not possible to have the best visual quality, so parents should also pay attention to whether the child's eye position is deviated.

The first step is to understand the development of vision in the eye.

a. The visual acuity of a 4-month-old infant is;

b. Visual acuity of 5-6 month old infants;

c, 7 8 months old baby has fixed vision, can long beam with time to see Zhenhong in a direction;

d. One-year-old children can recognize eyes, ears, nose and other organs;

e. 2 3-year-old children's visual acuity reached;

f. 3 4-year-old children with visual acuity;

g. Normal visual acuity in 5 to 6-year-old children is close to normal, while visual acuity is standard normal vision.

Therefore, the vision will generally be reached at the age of 6, so if the 6-year-old child's vision is above and above, then it is normal, and only need to do a good job of daily protection.

1. The time of close eye use should not be too long, every 40-50 minutes, you should take a little rest for 3-5 minutes, and look into the distance to relieve visual fatigue.

2. Read and write, play with the computer, maintain a correct posture, the height of the table and chair should be appropriate, and the distance between the eyes and the reading materials should be about 33 cm.

3. Mix whole grains, meat and vegetables, eat more vegetables and fruits, and don't eat partially. Lack of vitamins in food is prone to night blindness and dry eye disease, and lack of trace elements chromium and calcium in food makes it easy to suffer from myopia. In addition, it is also necessary to pay attention to regular supplementation of eye vision nutrients, not from the nutrients required by the eyes, enhance the anti-fatigue ability of the eyes, and better protect the eyesight.

Fourth, when reading and writing, the light should be moderate, not too strong or too dark, and the light should come from the left front, so as not to obstruct the vision of the hand shadow. The light should be soft, if it is incandescent, it should be between 25 and 40W, and it is not recommended to read in the sun. Because the intensity of light has a direct impact on pupil dilation, too strong light will increase the intensity of eye accommodation, aggravate the intensity of eye labor, and it is easy to cause myopia after a long time.

Generally, desktop lamps should be less than 40 watts.

5. Avoid reading while walking or reading in a walking car. Because the carriage is shaking, the body is shaking, and the distance between the eyes and the book cannot be fixed, the burden on the glasses will increase. Often, this is likely to lead to myopia.

6. Actively participate in physical exercise to enhance physical fitness. As the eyeball follows the target, the ciliary muscles continue to relax and contract, and the synergistic effect of the extraocular muscles can increase the blood perfusion of the eye, promote the metabolism of the eye, and thus reduce eye fatigue. Moreover, the quality of physical fitness is also closely related to the occurrence of myopia in children.

Malnourished and weak children are prone to myopia.

7. Insist on doing proper eye exercises. By massaging the acupuncture points around the eyes to enhance the blood circulation of the eye socket, improve neuronutrition, eliminate the excessive congestion in the eye, and achieve the purpose of relieving eye fatigue, it is conducive to the prevention and treatment of pseudomyopia in adolescents, and is a good way for adolescents to self-care their eyes.

8. Eat less candy and high-sugar foods. Too much sugar will produce a large amount of acidic substances in the blood, and the acid will be combined with the salt in the body, especially calcium, which will cause a decrease in blood calcium, which will affect the toughness of the eye wall, make the eye axis easy to elongate, and promote the occurrence and development of myopia.

At school age, about 6 to 7 years old, normal children's vision will develop to or above, and the eye axis will also grow to a normal level, which is called the emmetropia process of eye vision development. If you judge according to the standard of six years old and first grade, some children in this age group have reached normal vision, that is, or above, and some may have slightly lower vision, that is, around. If the examination does not reveal obvious refractive errors, anisometropia, strabismus, or other factors affecting vision, the visual acuity is normal.

If after the age of seven to eight, students are basically required to have vision of or above, and if this standard is not met, there may be a problem and further examination is needed.