In recent years, the vast number of primary and middle school students myopia rate is high, and presents the obvious upward trend, while the school classroom problem is one of the important reasons of primary and middle school students myopia.
According to the small and medium-sized school classroom
lighting and health standards '(
GB7793 -
2010).
Requirements, in the elementary and middle schools classroom should meet the following standards, specific as to find out together!
1.
Regular classroom desk surface illumination reached 300 lx, intensity of illumination evenness 0 or higher.
7, unified glare 19 or less.
2.
The blackboard illumination reached 500 lx, intensity of illumination evenness 0 or higher.
8.
3.
Ordinary classroom color rendering index of 80 or more, 3300 - color temperature
5500 k, unfavorable use naked light.
The above three, one, two points for compulsory standards, the third point for recommendation.
At present most small and medium-sized school classrooms are using fluorescent tube or common leds as lamps and lanterns, the lamps and lanterns is generally exist the following problems: one is the illumination and the intensity of illumination evenness is not up to standard.
At present a lot of the intensity of illumination of the classroom, intensity of illumination uniformity and show that all reach the national standard, quite a lot of the classroom is not even the blackboard lamp, students under low illumination environment for a long time to learn, easy to cause eye fatigue, cone cells of the human eye sensitivity also decreases, the passage of time can cause all kinds of vision problems.
Second, the glare is very serious.
National standard stipulated the classroom
led lighting glare value & lt;
19, and most of the lamps and lanterns USES simple fluorescent stents, the light source directly exposed, very dazzling light, light glare value more than 22, so that the eye muscles too nervous, the serious influence students' concentration in class.
Three is lights blinking.
General fluorescent lamps and lanterns USES ac power source, current interplanting unstable periodic changes in light intensity at any time, to study under the stroboscopic light source, the visual system need to constantly adjust the size of the eye pupil, to protect the stability of the light intensity and retinal imaging resolution, long time in this kind of light environment study, must make the pupil muscle fatigue due to excessive use.
Four is the light source color rendering index is low.
Ordinary fluorescent spectrum is not complete, can lead to a lack of color and color, far less than the national standard Ra 80 or higher.
Due to the difference of the color reproduction ability of lamps and lanterns again, will directly influence the student's color vision.
5 it is color temperature on the high side.
The nation classroom lamp color temperature is 3300 -
5500 k, while most of the actual measurement results achieved 6500 k classroom lamps and lanterns, colour temperature is exorbitant, blue radiation ratio increases, the blue light also will increase, blu-ray increase will cause the problem such as macular degeneration.
Six is the low of life.
Common fluorescent tube, use after six months will appear light attenuation, causes a decline in the luminous flux, which are not up to the standard of the classroom lighting and health requirements.
These problems easily induce students myopia, directly affect the students' vision health and learning efficiency.
This advice: 1.
For the entire province unified classroom lighting manufacturing standards.
Our province such as education, health, market supervision departments should be on the basis of extensive research, fully demonstrated, in strict accordance with 'the elementary and middle schools classroom led lighting and health standard' requirement, combined with the actual situation of the elementary and middle schools in our province, to work out the classroom lighting manufacturing standards.
2.
The classroom lamps production enterprise licensing system.
The relationship between the primary and middle school students eyesight health classroom lamps and lanterns, must be made to the relevant production enterprise qualification strict rules, issued production licenses to conform to the production of qualified enterprises.
Implement unified bidding for licensing products, unified purchase, unified supervision, to ensure the installation of lamps and lanterns comply with relevant standards.
3.
The school wants the lamps and lanterns of classroom tested periodically.
Provincial education authorities issued relevant documents, to guide the school on a regular basis to test the lamps and lanterns of the classroom, the clear standards change the light attenuation of lamps and lanterns.
4.
Increase financial support to the classroom procurement of lamps and lanterns.
Around the financial support to increase classroom lamps and lanterns of procurement, to ensure that the new classroom lamps and lanterns comply with relevant standards, and gradually change does not conform to the standard of original lamps and lanterns.
In addition, because the problem is one of the important factors affect adolescent eyesight health, in addition to further improve the current school outside the classroom lighting and health standard, but should also actively promote the daylighting of the families and public places to prevent adolescent myopia and health recommendation, multi-pronged, jointly protect children vision health.
The above is the 'classroom reform is how to protect good vision health teenagers' in detail, hope to help you!
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