Advices about Purchasing Kid Glasses

Kids eyeglasses mainly have the therapeutic effect on kids' eyes and may have some cosmetology effect. Protecting glasses well is the essential measure to ensure the normal function of children glasses. How can the children protect their glasses?

The glasses must be left in someone's care. When you take them off and give you eyes a rest, remember don't let the lenses touch the surface of the desk. When sleeping at night, you must put your glasses in the spectacles box in case of abrasion, crush and breaking. The glasses case can't be too soft, or the legs of glasses may deform after a long time of pressure. It will affect your eyesight because of the slant angle.

Don't use clothes or fingers to rub glasses when it gets dust or dirty things. The lens will be abrased and transparency will decrease in this way. In a long time, the lens will seems blurry as thin fog in front of the eyes. If there is oil or other dirty things on the lenses, you should blow it to make them merge in the water and then wipe it with the glasses cloth. if children cheap glasses blocked, or it can't correct eyesight normally, should go to the hospital to check in time, have an eye test, wear the glasses suitable again.

When children take part in sports or doing other violent activities, cast off the glasses and put it in the box. Children are energetic and love to move here and there, the frames are always made of plastic or acrylic. Such frames are bold, comfortable for children, not easy to broken, and seldom hurt the children as well. Moreover, they are cheap in price and have been very popular among the public.

The size of frames of glasses must be suitable. Some parents suppose that big frames are more beautiful and some think that small frames are tight so that it won't fall. These two opinions are both incorrect. Too large or too small frames will cause kids' eyes to deviate from the optical center of lens. Not only does not play the role which corrects defects of vision, but also can speed up the ametropia the development, even affects the facial features the normal growth. So the size of eyeglass frames should accord to the child's head, face, orbital eyes' development. And change the glasses while growing up.

A Handbook For Selecting Sunglasses

Sunglass has become an essential fashion item, and they would crazy to buy a wide variety of sunglasses. What should we pay attention to for better protection of the eyes when buying eyewear?

Do not buy acrylic lenses that are easy to deform due to heat, the best choice is glass material or resin. Glasses should ride down on bridge of her nose and ears submissively. If it leans against one side, you need to adjust at once. In addition, the eyelashes away from the lens is also one of the standards in measurement.

Don't choose sunglasses with small lens, which have worse effects in preventing optical lines. You should observe the glasses carefully to know if there are scratches, impurities, bubbles, stripes. And check the packaging of bifocals, the standard sunglasses should be marked with the formal name, color, diameter, quality levels, production factory name and trademark. There should be anti-UVA, UVB, and CE mark on the lens or hangtag in order to ensure a certain degree of UV separation.

The glasses should be flat, and the transparency degree should be high. The materials that can make the sun glass is glass and resin, and the best sun glass should choose polarized lens. In addition to the skin colour, face type and clothing, you should choose sunglasses according to the occasions.

In general, black, brown, gray have a good effect in filtering light. The gray lenses can absorb any chromatographic balanced. The scene you see after wearing glasses will only become dimming, but will not have an obvious color difference. Tawny lenses are able to filter out a great deal of blue light and improve visual contrast degree and clarity degree, in a seriously polluted environment or foggy circumstance, tawny lenses will have a particularly good effect.

At the beach, on strong light reflective snow ground and in strong sunlight, you should wear sports-type sunglasses, Most of them use the bright saturation color which can absorb or reflect more visible light.

In addition to relieve the glare's stimulation for comforting the eyes, the main purpose of wearing reading glasses is to prevent the eyes from ultraviolet damage. However, the colour of lens are not relevent to ultraviolet radiation. Even though the lens have dark colour, it is not certain that the prevent UV effectively. So you must choose lenses marked the function of preventing UV. Usually, the UV index of sunglasses is from 96 to 98 percent.