computer glasses over the counter
Astigmatism is astigmatism. Reasons for corneal Computer glasses astigmatism radian is not straight. Experts say, inferior glasses easily induced astigmatism in children. computer glasses to the child, therefore, must be careful, completes the work of preventing astigmatism. Inferior glasses easy astigmatism in children computer Glasses has become an indispensable part of people's life, the glasses market has a certain scale, but has not yet completely standardized, there are still many inferior glasses were sold on the market to consumers. You should be careful so consumer choose and buy Anti Glare Computer GlassesBecause, inferior glasses bring damage to people is very big, the children will affect the development scattered optical axis, the bridge of the nose and amblyopia treatment effect, the teenagers will affect the progress of myopia, for adults at the same time also will affect the appearance and cause eyestrain. In terms of the lens material, cheap eyeglasses resin matrix is not pure, can lead to vision distortion or vertigo. The Yellow Tinted Computer Glasses dispersion effect, easy to cause visual fatigue. Internal has bad stress, impact resistant ability is poor, fragile. Low light transmittance, uneven distribution of luminosity. Refractive index reach the standard of computer glasses propaganda, exaggerated degree of thin lenses. In addition, uv or prevent small amounts of ultraviolet light. At the same time, the lens surface treatment, shoddy, surface treatment is bad, no hardened the cost function. Coating technology is poor, easy to take off the computer eyewear,Film can not meet the requirements, minus reflection ability is low, there is no special function such as waterproof, anti-fouling, prevent mist. Eyes lens optical center held high, to the left or right, distance is not accurate, optical axis position is not accurate, etc, all can lead to inappropriate prism effect, influence the normal visual function. How to avoid the children with astigmatism eye disease 1, the light wants enough when reading a book, the light is best from left behind computer eyeglasses; Reading to correct posture, and keep the distance between 30 to 40 cm, it can prevent astigmatism. 2, don't read in the shaking car, also don't read lying down. 3, when selecting books font to be clear, Blue Light Blocking Tempered Glassnot too small. 4, to play outside more, see the distant green wilderness, protect vision, to prevent astigmatism is also very good. 5, to guide children to develop good health habits, not just by hand or the goods contact with eyes, in order to avoid infectious eye disease, if out less as far as possible when infected with eye diseases. 6, TV placed below the height in the parallel to the eyes a little, should be watching TV from television diagonal 5-7 times, effectively prevent astigmatism. 7, take heed, found that there is a problem, to the eye hospital.