In order to help everyone understand the knowledge of scientific eye use and eye protection, the Yanzhou District Center for Disease Control and Prevention has produced a series of popular science content to stay away from "small glasses".
Children have to do homework, read extracurricular books or do crafts every day, and these activities are inseparable from desks and chairs. Choose the right desk and chair to create a comfortable, healthy and productive learning and living environment for your child, and help them stay away from health problems such as myopia and abnormal spinal curvature. So, how to choose a desk and chair?
Here are a few important points to consider:
(1) The length of the desk shall not be less than 70 cm and the width shall not be less than 45 cm. The width of the chair matches the width of the child's hips and is not less than 35 cm wide. At the same time, it is recommended to choose a chair with a backrest that fits the child's back at a high level to provide support for the child's back and help him maintain a correct sitting posture.
(2) The height of the desk and chair should be adjusted in a timely manner with the growth and development of the child, and the height of the chair should match the desk. According to the height of the child, you can refer to the height of the desk and chair below to adjust. If the child's height spans two ranges, choose the appropriate height based on the principle of "when the child sits down, the back is straight, the thighs and upper body are perpendicular to each other, the thighs and calves are perpendicular to each other, and the upper arms are naturally drooping, the elbows are 3~4 cm below the tabletop".
For children up to 119 cm tall, it is recommended that the height of the desk is 49 cm and the height of the chair is 27 cm;
For children with a height of 113~127 cm, the recommended desk height is 52 cm and the chair height is 29 cm;
For children with a height of 120~134 cm, it is recommended that the height of the desk is 55 cm and the height of the chair is 30 cm;
For children with a height of 128~142 cm, the recommended desk height is 58 cm and the chair height is 32 cm;
For children with a height of 135~149 cm, the recommended desk height is 61 cm and the chair height is 34 cm;
For children with a height of 143~157 cm, the recommended desk height is 64 cm and the chair height is 36 cm;
For children with a height of 150~164 cm, the recommended desk height is 67 cm and the chair height is 38 cm;
For children with a height of 158~172 cm, it is recommended that the height of the desk is 70 cm and the height of the chair is 40 cm;
For children with a height of 165~179 cm, the recommended desk height is 73 cm and the chair height is 42 cm;
For children with a height of 173~187 cm, the recommended desk height is 76 cm and the chair height is 44 cm;
For children with a height of at least 180 cm, it is recommended that the height of the desk is 79 cm and the height of the chair is 46 cm.
(The above data comes from the National Standard of the People's Republic of China GB/T 3976-2014 "Functional Dimensions and Technical Requirements for School Desks and Chairs")
(3) If the height of the desk and chair at home cannot be adjusted, you can also refer to the above principles and make simple adjustments through "manual adjustment". For example, when the desk is too high, choose a higher chair as much as possible, and add a cushion under the foot to ensure that the child's feet are not suspended; If your desk is too low, you can add something underneath the desk to increase the height, but make sure it's secure and secure.
(4) If the desk is equipped with drawers, there should be enough space under the drawers to ensure that the child's knees are not obstructed when he sits.
(5) Avoid setting up baffles under the desk, so that children can move their legs freely during the learning process and reduce fatigue.
(6) It is best not to replace desks and chairs with adult desks, chairs, dining tables and chairs.
In addition to choosing the right desk and chair, parents should also guide their children to develop good eye habits to prevent the occurrence of myopia.
First of all, maintain a correct reading and writing posture, so as to achieve "one foot, one fist, one inch", that is, the eyes are one foot away from the book, the chest is one fist away from the table, and the fingers holding the pen are one inch away from the tip of the pen.
Secondly, use your eyes continuously for no more than 40 minutes at close range, and take a 10-minute break every 40 minutes or so, and relax by looking from a distance or doing eye exercises.
Finally, the scientific and rational use of electronic products. After using electronic products continuously for more than 20 minutes, you should rest and relax for 10 minutes, the younger you are, the shorter the continuous use of electronic products should be. The use of electronic products for non-learning purposes should not exceed 15 minutes each time, and the cumulative amount should not exceed 1 hour per day.
Source: Yanzhou CDC