1, computer use time is too long is the key to hair loss:
Mental high concentration on the use of computers, too long brain excitability will increase, endocrine disorders, and the sebaceous glands connected to the follicle secretion of the sebaceous glands will lead to hair follicle embolism, the supply of nutrients to the hair obstacles, the hair texture will become brittle, the hair will be lost. For minor hair loss, it can be alleviated by reducing computer use and regulating lifestyle.
2, the computer screen and other light, which contains a large number of irregular frequency of high-energy short-wave blue light, these short-wave blue light has a very high energy, can penetrate the lens directly to the retina.
Blue light irradiation of the retina will produce free radicals, and these free radicals will lead to retinal pigment epithelial cell death, epithelial cell death will lead to a lack of nutrients for the photosensitive cells, thus causing vision damage, these "inappropriate light" is a large proportion of the old age blindness - macular degeneration (AMD) is the main culprit.
Expanded:
1, the principle of radiation:
Radiation in the form of electromagnetic waves and particles (such as alpha particles, beta particles, etc.) to the outward dispersion. Radio waves and light waves are electromagnetic waves. They travel very fast and in a vacuum at the same speed as light waves (3 x 10^8 meters/second).
2, the main classification:
Visible light also belongs to the radiation, generally can be classified according to its energy level and the ability to ionize matter as ionizing radiation or non-ionizing radiation. It is generally common to use this term in ionizing radiation.
Ionizing radiation has enough energy to ionize atoms or molecules, while non-ionizing radiation does not. Radiation-active substances are substances that emit ionizing radiation. There are three main types of ionizing radiation: alpha, beta and gamma radiation (or rays).
Baidu Encyclopedia - Computer Radiation