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Doc. Sparrow who is the ophthalmologic doctor in Columbia University's branch medical center said most people shouldn't were blue glasses online no matter how old you are. Doctor Sparrow is investigating that if it will cause macular degeneration when eyes contact the blue light in the sunlight. This degeneration is the main cause that leads the blindness of the elderly. She believes that as age increased, a number of retinal cells in the photosensitive compounds will be more and more. While some wavelengths of blue light in spectrum, to the greatest extent, will activate these compounds, promoting the release of harmful free radical, It threatens the health of eyes as damage the hyperoxidation of retina cells.

Blue colored sunglasses really harm eyes. On one hand, blue light has short wavelength, so in the blue light, human eyes has the smallest ken and can not see things clearly. On the other hand, blue is the color closest to UV, which is also detrimental to the optic nerve and easily causing injury to the eye. Many opticus diseases are proved to be related with the blue ray clinically.

In addition to the glasses with blue lenses, the currently popular colorful contact lenses with blue stripes are also harmful to eye health. When choosing them, people should take care. So what color of prescription eyeglasses is safe for us to buy? Professor Sparrow said, yellow or brown sunglasses are the best. Human eyes' retinula cells are most sensitive to yellow as it has moderate wavelength, and can make things in nature seen more clearly. Moreover, yellow sunglass can also filter blue light, and then decrease the number of blue light. So it can protect eyes' health effectively. Besides, black lens are also a good choice as they can protect eyes from all colorful rays.

At last, Doctor Sparrow advises customers that there are good and bad glassed mixed up, many glasses quality donot pass the test. When you coose sports eyeglasses, you'd better choose the one which has the function of defending ultraviolet light, and the index is usually between 96% to 98%. Don’t choose to dark color lenses because their transmittancy is low. It will make pupils dilate, which harm eyes.

While you select eyeglass frames, a qualified frame is critical, especially for kids glasses. In particular, the cheeper doesn't have the ability of pouring out. If the glasses are unfit, the parents often think that their child is too piquant to like wearing the glasses. In fact, a pair of improper glasses is harmful to their eyes and will even bring about their aversion to wear glasses. Selection of children glasses needs to consider the following several aspects:

The frame for kid glasses should be light. In generally, the appropriate weight of children glasses should between 13 gram and 19 gram. Children's head is very different from that of adults, there, in particular, being apparent difference in the angle and degree of curvature between children's and adults' nose. Therefore, in the selection of frames, it is necessary to observe the kids' face, fat or thin, the nose and other features as well. Most of children's noses are rather low, and the nasal bone has not developed fully well, so we should choose glasses with a pair of high or adjustable nose pads. If the nose supports are too low, the frames will too close to the face, or even touching the eyelashes, causing the frames can't be used. Children's glasses frames that can hang on ears with an elastic band around the back of the head are the best ones. The bands should not be too loose lest that the glasses slip from the children's heads.

Generally, there are various styles and colors for kids eyeglasses frams, and they also pay much attention to the choice of frames. Meanwhile, their pursuit of beauty is no less than that of adults. However, to choose glasses for children should also be realistic and it is of frequent occurance that most children are too naughty so as to break lens and therefor get eyes injured. So, the lenses should be made of resin, with suitable plastic frame that could adhere with the surface of nose. In addation, it’s economical to choose plastic frame for children from an ecnomic perspective because children’s eye dioptre changes quikly and they need new lens in about a year.

Children are not suitable for wearing metal frame, because nose pads of the metal frames can easily cause allergies and oppress the nasal bone. which will be much serious if the clip is incorrectly adjusted. In addition, the metal frame is easy to be deformed and broken, which will influence the appearance and use effects. But the plastic frame is a more reasonable choice for children spectacle frame, for the plastic frame is too hard to be damaged easily. If they like metal frames, don't choose perforated frames and semi-frames. These two kinds of frames are easier to be broken.

There should be enough sight range for children glasses online because children take part in activities in wide range area. Try not to choose those frames which containing shadows and dead points in sight. And avoid the frames which are too big or with too long hangers.

There are diverse types of contact lenses available on the market, daily disposable, monthly disposable, seasonally disposable. There are also a variety of stylish and colorful lenses. But only prescription glasses suitable for your own is the best, suitable for your own contact lenses bring eyes comfort.

It's a simple and effective method to check up your eyes professionally by professionals in eyeglasses store or regular hospital before buying contact lenses. Each person's eye condition and requirment are different, some people are not suitable for wearing contact lenses. Not only causing eye discomfort if you wear unsuitable contact lenses, but also raising eye potential disease seriously.

In winter, it is easy for human body to accumulate much fat, and eye fat would similarly increase. Then you need to give the lens more care than usual.

Wash your hands before you clean the glasses. After taking off the glasses, dip some multi-function care liquid on the surface of the glass and rub the contact lenses evenly and gently, 15 minutes for inside and 15 minutes outside respectively. Steep lenses in MPS box after washing fiercely by MPS. Fat and protein attached to lenses are dislodged obviously by rubbing, which would make lenses fresh and cool. It is safe to wear glasses online the lenses in the valid date, but the lenses can appear some damagements unidentified by our eyes if they are out of the valid date.

At the same time there will be sediment on the lens, which will reduce the comfort when wearing, affect the eyes' health. In order to ensure the product performance, use the lenses prior to the deadline on the packing and replace lenses according to the number of anandon days. The same as lenses, the storing box also has life-cycle issues. Mirror box is small but can't be ignored, bdcteria will be freeded if its not properly cleaned.

The case must be thoroughly cleaned every week and replace a new case every three months. Adequate sleep allows our skin to obtain adequate metabolism, but wearing contact lenses overnight or taking a nap will make it is difficult to directly absorb oxygen from the air for the cornea. At the same time, the cornea is in a continuing state of hy Therefore sleeping or napping with the reading glasses lenses can get the corneas impaired to varying degrees and lead to the decrease of the humidity of the lense surface as well, or even the lense can be dangerously attached to the corneas.

No matter for escaping from the dag packs or better matching clothes, or just for shelting from the dazzling sunshine, glasses online are without any doubt one of the must-have accessories of all the stars. In Hollywood, the big sunglasses are still leading the trend and the bigger, the better. hanel, Prada and Gucci are the most common star sunglasses, first-line brand.

Flyer sunglasses or a Audrey Hepburn sunglasses are all associated with a high exit rate of stars sunglasses styles. Kate Hudson like to wear flyer sunglasses. While Jessica Alba and Michelle Trachtenberg are fond of Audrey Hepburn sunglasses. which eyewear suit women with heart-shaped face, Style choices should pay attention to the size of the problem, the best is just to cover a small part of the brow.

Either Ray-Ban or all black sunglasses can be regarded as the real star rank, pretty cool. indifferent and also very super star. Let's take a look at Nicole Richie wearing Ray-Ban sunglasses, Victoria Beckham wearing all black sunglasses look like, multi-such as Fan Son. However, the over angular frame is also very picky to the shape of wearer's face, and the best is the "palm-shaped" face with clear figure.

Butterfly-shaped sunglasses can basically block eyes and brows, and will also lift their locations in the face; at the same time, they can emphasize the parts of forehead and cheekbones. Eva Longoria, Audrina Patridge and Jennifer Lopez all thoroughly interpreted the match of butterfly-shaped sunglasses with face shapes. If you are very confident in the both parts, the butterfly-shaped sunglasses are also very suitable for you!

Although the two-tone eyeglasses frames of Chanel can certainly give a deep impression, It looks too eye catching in daily life. Eliza Cuthbert and Angelina Jolie are good examples.