Abstract: the appearance of newborn’s eyeball is almost round, and the adjustment ability of eyeball lens and ciliary muscle is poor. After parallel light passes through the refractive system, it falls behind the retina, which is good for hyperopia. After about 6 years old, children’s visual development tends to be perfect, gradually developing from hyperopia to emmetropia. This process is called the emmetropia of the eye.
with the progress of society and the emergence of high-tech products, children spend more and more time on mobile phones and computers. This problem arises. Due to improper eye habits, children’s eyes are exhausted by the radiation of electronic products, vision problems are becoming more and more serious, and the number of myopia is increasing year by year. Parents really regret it. Children’s vision problem has become one of the most concerned problems in society. In order to give children a clear world, parents must supervise their children to protect their eyes.
children’s visual acuity standard
people all know that the normal visual acuity of adults is 1.5-2.0. Then, how much should children’s normal visual acuity be? Newly born infants have weak eyesight and short ocular axis. They are hyperopia. Later, the eyeballs gradually develop and their eyesight gradually increases. The child’s eyeball develops vigorously before the age of 8, slows down after the age of 8, and begins to shape around the age of 25.
infants are born with immature tissues and functions in all parts of the eyes. Most infants and young children have normal or mild hyperopia. The newborn has poor vision and can only see the outline of objects within 2-3 meters.
generally speaking, the normal visual acuity of children is as follows:
a. the visual acuity of 4-month-old infants is 0.02-0.05;
, visual acuity of infants aged 5-6 months was 0.04 ~ 0.08;
C. infants aged 7 ~ 8 months have fixed vision and can see one direction for a long time;
D. one year old children can recognize eyes, ears, nose and other organs;
e. the visual acuity of children aged 2 ~ 3 years old reaches 0.5 ~ 0.6;
F. the visual acuity of children aged 3 ~ 4 years was 0.7 ~ 0.8; g. The normal vision of children aged 5 ~ 6 years is close to 1.0, and 1.0 vision is the standard normal vision.
about 20 years old, the eyeball is fully developed, and the visual acuity can reach about 1.0 ~ 1.5.
newborn’s eyeball appearance is almost round, and the adjustment ability of eyeball lens and ciliary muscle is poor. After the parallel light passes through the refractive system, it falls behind the retina, which is good for hyperopia. After about 6 years old, children’s visual development tends to be perfect, gradually developing from hyperopia to emmetropia. This process is called the emmetropia of the eye.
children’s vision examination
is the golden period of vision development from the birth of the baby to the age of six. According to statistics, the rate of poor eyesight of preschool children is 10%, and the rate of myopia of primary school students is 20%. What can we do to protect the baby’s eyesight? For children’s vision problems, if they can be found early, early treatment measures can be taken, and the probability of cure will be higher. So what are the aspects of children’s vision examination? Let’s take you to learn about it.
standard visual acuity examination include far vision and near vision.
1. Check far vision: China usually uses the international standard vision chart and the logarithmic vision chart created by Miao Tianrong. During the examination, the subject sits 5m away from the visual acuity chart, the international standard visual acuity chart 1.0 or logarithmic visual acuity chart 5.0 is at the same level as the subject’s eyes, and the eyes are examined respectively, from right to left, from top to bottom. The examinee quickly said the direction of the visual mark gap and recorded the font size of the line of the smallest visual mark that was right. The visual acuity of normal people is 1.0 or 5.0. When the visual acuity is lower than 0.1, you can gradually approach the visual acuity chart and press 0.1 × D / 5 calculate the visual acuity (D is the distance from the visual acuity chart when the subject sees the line).
2. Check the near vision: Jaeger’s near vision chart and the e-word standard near vision chart designed by Xu Guangdi are usually used in China. The visual acuity chart should be placed in a well lit place or illuminated with fluorescent lamps. Normal people can see behavior 10 clearly at a distance of 30cm under normal light. 1.0. If the distance between the visual acuity chart and the eye is changed due to myopia or hyperopia, the changed distance shall be recorded together.
children’s visual examination time
hearing is basically fully developed and mature about one month after birth, but vision needs a long time to develop slowly. Only about 6-8 months after birth can the baby basically see as clearly as adults. As parents, parents need to test their baby’s eyesight regularly to ensure the healthy growth of their baby. When should children’s eyesight test be carried out? The following mother net encyclopedia answers for you.
stage 1: objective observation method
objective observation method is used within 2 years old, The inspection formula is that January is afraid of coming to February (afraid of fingers and light, moving fingers rotate eyes with adults’ activities); in April, touch colored objects; in June, close objects can be grasped; in August, there is following eyes (where adults’ fingers go, where babies’ eyes see, and stay fixed); at the age of 1, accurately point to nostrils; at the age of 2, walk away from objects “In addition, if babies aged 4-7 months have vision problems, their behavior of crawling and playing with toys is usually slower and less accurate than that of babies of the same age.
stage 2: hand and animal image examination
Children aged 3-5 can be examined with hand and animal visual acuity chart. It should be noted that it is necessary to teach the baby to understand the visual acuity chart patiently at home earlier and check it repeatedly, otherwise it will affect the accuracy of the results.
stage 3: adult visual acuity chart examination
babies over 5 years old can be examined with adult visual acuity chart. If you cooperate well, you can measure your eyesight. The normal visual acuity of children of different ages in China is: 2 years old: 0.4-0.5, 3 years old: 0.5-0.6, 4 years old: 0.7-0.8, 5 years old: 0.8-1.0, 6 years old: 1.0 or above.
suggest that if the baby’s vision is found to be defective according to the above methods, it should be diagnosed and treated in time. When you cover your baby’s eye with your hand, the baby is happyLaughing or struggling to resist, but covering the other eye does not have this reaction, it shows that there is a problem with the vision of this eye, and you should take your baby to see an ophthalmologist
how to deal with children’s poor eyesight
children’s poor eyesight is a common phenomenon in life. Parents usually wear eyes directly for their children, but after a period of time, parents will find that the phenomenon of children’s poor eyesight still exists. This is because children get not myopia, but amblyopia. The corrected visual acuity of myopia can return to normal after wearing glasses, while children’s amblyopia is a kind of visual function retardation and disorder, often accompanied by strabismus and high refractive error. The visual acuity can not be corrected to normal after wearing glasses. The two diseases are essentially different. When parents of
find that their children have poor eyesight, they should first go to the hospital for examination. When non ametropic eye diseases are excluded, if it is ametropia, they must carry out mydriasis optometry under the guidance of doctors, accurately diagnose the nature and process of ametropia, and then classify it for correction.
ametropia is an optical defect, which can only be treated by optical principle, that is, the purpose of controlling the development and gradually improving can only be achieved by wearing appropriate glasses. Children are in the stage of growth and development, and their ametropia will develop with the development of the eyes. Therefore, they must be rechecked every six months, replace appropriate glasses according to the refractive state and pupil distance, and take appropriate wearing methods to achieve the purpose of correction.
in order to save trouble or unwilling to let their children wear glasses, many parents either have optometry at the glasses store and give their children a pair of glasses. As a result, their children’s eyes are getting worse and worse. When they want to correct again, they have developed to an uncorrectable level.
children’s optometry must have mydriasis, because children’s eyes have strong adjustment force. This adjustment is a process of ciliary muscle contraction and lens convex in the eye. If optometry is carried out in this state, it is easy to cover up the real diopter due to adjustment, and the optometry result is inaccurate. After using mydriasis agent, the ciliary muscle is paralyzed and relaxed, The nature and degree of ametropia can be truly reflected
children’s eyesight is not delicious.
nowadays, there are more and more electronic products, children’s eyes are also exhausted by electronic product radiation, vision problems are becoming more and more serious, and the number of myopia is increasing year by year. Seeing this situation, many parents are worried. So what’s wrong with children’s eyesight? Let’s talk about it in detail.
[vegetables and fruits are indispensable]
eating more vegetables and fruits is very important to people’s health. For the eyes, vitamin A, vitamin B and vitamin C rich in vegetables and fruits are very important.
Vitamin A can effectively prevent and treat dry eye. When lacking vitamin A, it is easy to cause eye photophobia, and severe cases may suffer from night blindness; Vitamin B of
is very important to the health of eye retina. Lack of vitamin B will not only lead to eye photophobia, tears and itching, but also reduce eye immunity, easy to produce visual fatigue and affect vision;
vitamin C itself is an integral part of the eye lens, and its importance can be seen. Eyes lacking vitamin C are easy to suffer from eye diseases such as cataract.
[black bean walnut powder is very useful for protecting eyes]
materials: black bean powder, walnut powder, milk, honey
practice: one spoonful of black bean powder and walnut powder, brew a cup with hot milk, and add a little honey according to your taste.
Effect: supplement vitamin B1, increase eye muscle strength, strengthen mediation function, effectively improve eye fatigue and contribute to eye vision health.
[yam soup has great function of improving eyesight]
materials: medlar, mulberry, yam and red jujube
method: Boil ten grams of medlar, mulberry, yam and several red jujubes into soup with water.
Effect: if people with eyesight fatigue can insist on taking it, it can not only eliminate the symptoms of eyestrain, improve their eyesight, but also enhance their physique.