What are the vision standards for children?

With the popularity of electronic products such as mobile phones and computers, most families are equipped with electronic products. Children at home also like to play with mobile phones and computers. As long as they have time, they will stay in front of the TV and watch TV all day, which will affect their eyesight. This factor is also the main reason for children's vision loss. Parents should understand the children's vision standards in life to judge whether the children's vision is abnormal. So what are the children's vision standards?

Generally speaking, the vision of a newborn is only 20% of that of an adult, and the baby can focus on and track moving targets; at one year old, it is equivalent to 10% of that of an adult (0.1-0.2), and at two years old it is equivalent to 40% (0.4). With each additional year of age, the vision increases by about 0.2, and at five years old, the vision is basically fully developed and should reach 1.0. Normal vision development comparison table for children under 5 years old: Age vision

1 year old 0.1

2 years old 0.4-0.5

3 years old 0.6-0.7

4 years old 0.8

5 years old 1.0

The visual acuity development standard for children aged 1 to 3 years old is approximately between 0.1 and 0.6. Generally, it is 0.4 at the age of 2. The child can already judge the distance of objects, and his vision can keep up with fast-moving objects and see them clearly. At the age of 3, it is 0.6. The child has a sharper vision, likes to observe, can use the eyes to guide the hands to touch new things, has more flexible eye-hand coordination, and the establishment of stereoscopic vision is almost complete. I hope my answer can help you.

Developmental characteristics of newborns (0 to 6 years old):

When a baby is born, he will respond to light, but his eyes are not fully developed, his visual structure and optic nerve are not yet mature, and his vision is only 1/30 of that of an adult. He can follow objects in front of him, but his field of vision is only about 45 degrees and his visual acuity is only 1/30 of that of an adult. And it can only track people or objects 18 to 38 cm in the horizontal direction and in front of it. Newborns prefer to look at more complex shapes and curves, as well as bright contrasting colors. The focus of health care at this time: detect congenital abnormalities as early as possible. Attention should be paid to the size, shape, position, movement, color, etc. of the child's eyes to detect congenital abnormalities as early as possible, and infectious eye diseases originating from the birth canal should be prevented and treated. Child safety seat brand home inspection method: Shine a flashlight into your eyes. At this time, the newborn immediately closes his eyes. If you lightly open your eyelids and shine a light into your pupil, it will shrink. This is called the pupillary light reflex. Head-eye coordination. The newborn baby lowers his head forward with his eyes turned upward; the head tilts back with his eyes looking downward, which is called doll eyes.

A brief, raw gaze. Using a big red pompom and moving it 60 degrees at a distance of 20 cm from the eyes can cause the newborn to look at the red ball, and the head and eyes will slowly follow the movement of the red ball. This is called head-eye coordination. Which brand of safety seat is good? Motor nystagmus. Place a paper cylinder or drum (about 10 cm long and 5-6 cm in diameter) with black vertical stripes 20 cm in front of the newborn's eyes and rotate it from one side to the other. When the newborn looks at it, nystagmus will occur, that is, the eyeballs will follow the rotation of the cylinder or drum to make horizontal movements. Which brand of safety seat is good? This is called visual motor nystagmus. If all the above four examinations meet the standards, it means that the newborn's vision is well developed. Otherwise, you should immediately ask a doctor for further examination, especially for premature babies.

A standard vision test includes both distance and near vision. Check distance vision: During the check, the person being checked sits 5m away from the eye chart. The international standard eye chart 1.0 or the logarithmic eye chart 5.0 is at the same level as the eye being checked. Check both eyes separately, first right then left, and from top to bottom. The subject quickly states the direction of the sight mark gap and records the font size of the smallest sight mark line that he/she correctly states. The normal visual acuity is 1.0 or 5.0. When the visual acuity is lower than 0.1, the children's visual acuity standard can be gradually approached to the visual acuity chart, and the visual acuity can be calculated as 0.1×d/5 (d is the distance from the visual acuity chart when the subject can see the line clearly). Check near vision: my country usually uses Jaeger's near vision chart and the E-standard near vision chart designed by Xu Guangdi. The eye chart should be placed in a well-lit area or illuminated by fluorescent light. Children's vision standard: A normal person can see the 10th row clearly at a distance of 30 cm under normal light, which is 1.0. If the distance between the eye chart and the eye is changed due to myopia or hyperopia, the changed distance should be recorded.

The vision standards for children are based on facts. After the patient has a vision test in the hospital, the doctor will diagnose the child's vision problems. If there are any abnormalities, the doctor will ask the patient for further examination or make relevant suggestions based on the condition. A child's vision is 0 after birth, but after a period of growth, the vision will improve. However, it will also decline due to the influence of adverse factors. Therefore, children's vision must be taken seriously.