From 'the Taiwan solar lamp that shield an eye'

1, 'the lamp that shield an eye' market demand from students with the eye excessive myopia incidence in 2005 students in our country is: the primary 78% 27%, 53%, 73% for high school students, college students in junior high school students. In the coastal city of the poor vision rate has reached 85% of high school graduates. China's Taiwan, 15, students myopia incidence was 81% higher. More serious is the blindness of the altitude increased the onset of myopia. 2005 Beijing students poor vision detection rate continues to rise, 31% primary school students, junior high school students, high school students 62% and 78%, higher than the national average. And the Shanghai students poor vision detection rate is the nation, primary school students 42%, 74%, 81% of high school students in junior high school students, higher than the national average. Students of myopia rate in our country has been ranking second in the world. Teenagers in our country because of the number of myopia blindness has amounted to 300000 people. The vast majority of students vision loss is caused by excessive with the eye. Among the students in high myopia patients, and as people deepen understanding of vision protection importance, many lamps and lanterns manufacturers cater to the needs of the market, have launched a 'new technology, new product' lighting lamps - — 'The lamp that shield an eye'. 2, 'eye' and the relationship between the lamp performance without strict scientific reasoning as 'eye' and the relationship between the lamp performance did not pass strict scientific reasoning, and the lack of clinical relevant certificates 'eye', 'the lamp that shield an eye' on the market at present such as there is no scientific basis. 3, the so-called 'the desk lamp that shield an eye' on the market characteristics of the so-called 'the desk lamp that shield an eye' on the market selling point is claimed that 'no stroboscopic, with functions of eye'. Most of the 'eye' is to use electronic ballast make fluorescent lamp in the principle of high frequency electric work flow, usually in more than 20 KHZ frequency, the frequency relative to the inductance ballasts for fluorescent lamp in power frequency electric work shed 50 hz, almost feel high frequency shine to the naked eye. But even the naked eye can't feel, there is a stroboscopic, just using high frequency electronic ballasts stroboscopic at work than make labor frequency inductance ballasts stroboscopic at work is more small. But high frequency flashing affect vision research work is still not sure caused by the light of the high frequency stimulation of the retina nerve response will affect any visual perception or motor nerve function, so it is difficult to determine whether it can effectively protect your eyes.

now many businesses use gyro test method to prove to consumers 'the desk lamp that shield an eye' of the so-called eye effect. Gyro testing method is a simple way to illustrate the stroboscopic effect, only shows that using high frequency electronic ballasts stroboscopic at work than make labor frequency inductance ballasts stroboscopic at work is more small, does not prove that the effect of eye. 4, comfortable lighting is provided by the desk lamp can use visual task of science evaluation on the intensity of illumination, visual operation on the ratio of the maximum intensity of illumination/minimum illumination, work around the ratio of the intensity of illumination and assignment / / environment around the brightness to evaluating the comfort of desk lamp lighting. Generally speaking, reading and writing assignments lighting requirements are shown in table 1, the computer operation of lighting requirements are shown in table 2.

table 1 generally, speaking, reading and writing assignments lighting requirements of

table 2 computer operations lighting requirements

5, provide comfortable lighting lamp standards a) GB7000。 11 - 1999 'portable general safety requirements of lamps and lanterns'. b) GB7000。 1 - 2002 'general safety requirements and test of lamps and lanterns; c) GB17743- 1999 'of radio disturbance characteristics of electrical lighting and similar equipment limits and measurement method. d) GB17625. 1 - 2003 'emc limit harmonic current emission limit value ( Equipment input current in each phase 16 a or less) 》； Provide comfortable lighting lamp besides should comply with the above 3 c authentication involved in safety and emc standards, should also meet the following requirements: e) GB / T9473 - 200 x 'reading and writing assignment desk lamp performance requirements'; f) GB50034 - 2004 'building lighting design standard'; g) ISO 8995:2002/CIE S 008/E- 2001 'indoor workplaces lighting'. 6, provide comfortable lighting lamp of choose and buy some problems that should be paid attention to a) Pay attention to the lamp shade, should have a fair amount of shoot the light, shoot the light lighting on surrounding environment. If only down lighting light, concentration and intensity of illumination in the limited area is very high, but range is not big, use after a period of time there will be a visual fatigue. b) Adjustable height should be 40 cm or more, the best. If the height of the lamps and lanterns below 40 cm, with the human eye level or slightly lower, easy to generate large contrast, make the eye continuously in adjustment, to adapt to the changes in light and shade. At the same time, the structure of the lamps and lanterns should properly keep out side the strong light, when the eyes in 40 cm height look over to the lamp, should not see the interior surface of reflector and the light source, otherwise it will cause glare. These are easy to cause visual fatigue, long-term use can affect vision. c) The choose and buy when the desk lamp of computer operation, should pay attention to the height of the desk lamp, higher than the computer, or you will make it darker surroundings, make the eyes constantly adapt to the change of light and dark, easy to produce visual fatigue. Formation and improper has much to do with the eye of myopia, excessive with the eye is the important reason for the formation of myopia, at the same time the formation of myopia and genetic, nutritional factors also have a certain relationship. No matter use what lamps and lanterns, don't stop long with eye fatigue, the child's vision to bet on for the desk lamp that shield an eye is no scientific basis. The key to the prevention and treatment of myopia or get into the habit of science with eye, pay attention to their health with the eye, sitting position must be correct when reading a book, a rest every 45 minutes time, avoid eyes too tired. At the same time pay attention to the local lighting and the overall lighting used at the same time, form a comfortable lighting environment, so as to protect his eyes.