This winter break is
After the implementation of the "double reduction" policy of compulsory education
The children ushered in
First holiday
When making up classes becomes a thing of the past
When "book mountain title sea" is no longer preferred
Children's winter vacation life
How's it going?
During this winter vacation, have your home been "visited" by professionals from some district CDCs and community health service centers? With a lux meter, ruler, etc., they not only measured the visual environment of the family on the spot, but also assessed the child's eye behavior, and issued "personalized" health prescriptions for the prevention and control of myopia in different families.
Let's take a look at it together.
How to build a friendly home-friendly visual environment!
Study desk
Made of a light matte material with a reflectance of 30-70%, a light matte tabletop, similar to the color of the reading material, the table should not be black or dark and should not be shiny, such as a glass table top.
Table high chairs high
Adjust periodically. For details, please refer to the "Functional Dimensions of School Desks and Chairs (GB/T 3976-2014)". If you have no concept of specific dimensions, you can simply judge in the following ways:
(1) When the feet are flat on the ground, the thighs and calves can be basically vertical, and the chair height is the most suitable table height for you.
(2) Two elbows on the table, the upper arm and the forearm are basically perpendicular, the back is straight, the shoulders can be kept straight, the distance from the eyes to the desktop at this time is about 30-35cm, and the table height is the most suitable table height for you.
Try to place the desk in a place where there is enough light and not too strong.
Table lamp When there is a comfortable table and chair, the table lamp is also more essential than essential, because the daily lighting in the family is mostly decorative lamps, it is difficult to achieve the level of writing reading illumination.
Table lamp optional
01 Illuminance and illuminance uniformity
Illuminance, simply understood, is the brightness of the surface of the object after the light is illuminated. Illuminance uniformity refers to the uniformity of the illumination light.
*The parameters of the table lamp trademark will be marked as illuminance and uniformity as "illuminance grade", "A" grade and "AA" grade, and the "AA" grade illuminance and uniformity are higher.
02 Shading
When the table lamp is in the normal working position, the user will not see a strong light.
03 color temperature
The evaluation of the color of the light, the lower the color, the yellower, the higher the color, the whiter, can be simply understood as yellow light, warm light and white light (super bright) lamp. Normal read and write settings are set between yellow and white light.
*If you choose a non-adjustable brightness read-write lamp, the color temperature should be 4000K; the adjustable read-write lamp color temperature range should include 4000K.
04 Color rendering
The ability of the light source to reproduce colors. 0-100 The larger the value, the more real the color, the children's reading and writing table lamp requires the color rendering index to be no less than 80, it is best to choose a learning table lamp with a display index greater than 90.
05 Blu-ray and strobe
Blue light and stroboscopic are common in all kinds of light sources, parents must choose products without blue light (RG0) when choosing a read-write table lamp.
Table lamps are included in the national compulsory product certification directory and must be affixed with the CCC mark.
Table lamp use
• Pay attention to the height of the table lamp. It is recommended that the height of the lamp surface is about 35-40cm from the desktop, so that the eye cannot directly see the luminous surface.
• The distance between the table lamp and the person. The table lamp is placed in the upper left corner of the desktop, 30-50cm away from the human body, and the outer circle of the table lamp is used to learn.
• Pay attention to the table lamp when reading writing while turning on the background lighting. Improves the uniformity of spatial illumination and improves eye comfort.
Source: Kingsoft Health
Edit | Weng Yu
Editor-in-charge | Shen Yanfei