You must know these to buy contact lens online

If you are a myopic person and want to buy contact lens online.You must know these before buying contact lens online.

Friends long-term used of computer are not suitable to wear contact lenses

The researchers said that contact lenses that commonly used are manufactured by the polymer material, although they are various different brands of materials, but the experiment showed that all of the contact lenses under radiation exposure by the computer will break down gradually degenerate , making the variation of the original material molecules, the decomposition of small molecules, and some will reach the lens through the lymphatic circulation, and the combination of the lens of the repair tissue, resulting in a new polymer.

Generally speaking, a small amount of polymer is expelled from the eye to the ocular surface, and eventually gum. But the output is more time, more than the size of the polymer discharge hole size, this time, the debris will accumulate within the eye in the crystal body, giving rise to cataract.

Experts Call for the ones wearing contact lenses and often using computer, must put off the contact lenses when having a rest, and have sufficient time for the eyes discharge of waste, if not so, it is easy to suffer from cataracts.

The appropriate time for wearing:

The normal reaction of wearing by the beginning :
Slight dry feeling, photophobia, transient blurred near vision, foreign body sensation, visual zoom in or out
The above is normal, after a period of adjustment period, one or two weeks will disappear naturally. Spectacles worn by the beginning of the week, and if the symptoms continued to increase, then you'd better remove the contact lens immediately.

Knowledge of contact lens UV
UV contact lenses through the increase of chemical raw material monomer in the UV absorption material, can block 99% of harmful ultraviolet B and 80% of the ultraviolet A, ultraviolet rays enter the eye through the cornea, causing major eye damage, such as cataract, snow blindness, etc. . Close to the hidden eye lens, eliminating the light leakage around the mirror frame, non-staining clear need for indoor and outdoor occasions. But the mirror does not cover hidden around the eye tissues, transparent lens does not relieve summer on the strong glare and winter snow, so the serious pollution in the outdoor season and the ultraviolet region, we advocate coupled with UV protection to wear sunglasses or sun Sports transparent protective goggles. Compared with the normal function of contact lenses, multi-layer anti-UV protective contact lenses to prevent eye damage caused by UV, health and safety more secure.

Notes for contact lenses used outdoor, I want to remind you:

Contact lenses have the two biggest enemies - cold and dirty, here are some simple tips to deal with them.
◎ Outdoor activities usually dirty, dust and other small particles when mixed in between the contact lens and eye, because the friction generated by eye movement pain is a very disturbing thing - this will cause friction or even permanent eye disease. So, when you really need to touch or remove the contact lenses when the eye, make sure your fingers are clean, wash hands with soap if no conditions, should at least carry the water to rinse them several fingers come into contact with the eye . When there is no water, that the use of contact lens care solution rinse fingers stronger than the direct eye contact.

◎ camping in the outdoors, in order to avoid wearing contact lenses when the loss of picking the best approach is to support your elbows on the moisture mat or sleeping bag, and then take off or wear contact lenses, so do not even contact lenses fell off, and fell in moisture-proof pad or sleeping bag fall to the ground than on Shanghao find much, but also much cleaner than the ground.

◎ must remember to prepare luggage before departure time, take care solution bottle filled with travel, if careless forget to bring one o'clock, after boiling the water in clean containers after cooling to temporarily replace the care solution.

You can also have a look at the article:Some notes to buy contact lens online

Experts advise you to consider these issues about to buy contact lens

Today's advanced science and technology，not only can make the aircraft invisible, glasses can also be invisible—that is contact lens.Many following fashion guys are going to buy contact lens,but it seems that most of them don't know that the contact lens is not suitable for everyone.Experts advise the ones to consider these issues before buying contact lens.

First of all, contact lens is not as cheap as glasses,it is more expensive.Besides,it should be used with care solution,so the cost including the contact lens and care solution is a small fortune.If your economy are not enough good, think twice about it. 

 

Secondly,It's very important to choose a suitable type of contact lens for yourself.Each eye conditions and requirements are different, we should choose the suitable one for ourselves,the suitable one is the best. For example, if the one wearing glasses often has the feeling of dry eyes, he(she) should select the lens with lower water content and not too thin. If the one wearing glasses a long time need to wear contact lenses, and often overnight wear, will have to select the high oxygen permeability contact lenses for continuous overnight wear (such as pure as the Bausch & Lomb contact lenses produced), in order to avoid corneal Hypoxia caused by a variety of complications.

Before buying contact lens,if you can,you'd better consult an eye specialist before shifting to contact lenses from eye glasses. Contact lenses may not suit one's eyes and may cause infections; the eye specialists can advice about the type of lens that can be used.

What's more,while buying a contact lens, people should always go for the well known lens manufacturers like Bausch and Lomb, Ciba Vision or Cooper Vision; these types of world famous lens manufacturers provide excellent quality lenses which long last and provide excellent performance for the protection of the eyes.

Finally, the solution provided with the contact lens must be chosen very carefully. This solution is very essential for the maintenance of the lenses and increases its longevity. Besides, it also provides extreme protection for the eyes.

Finishing reading the above,if you want to know more,advise you to read this article:You have to consider several things to buy contact lens.

Sharing Knowledge of progressive multifocal lens

Progressive multifocal lens fitting technology, optical industry in recent years has been a relatively hot topic. The author from the progressive multifocal lenses begin the basic concepts and identify and share relevant experience with knowledge.

     A progressive multifocal lens of the basic identity

     If a single optical lens will be from the appearance of progressive multifocal lenses with the comparison, the biggest difference between progressive multifocal lenses than on the surface of explicit and implicit tags, and there is no single optical lens. If you want progressive multifocal lens of experience with understanding, they must be familiar with the identity of the lens. The figure is the basic identity of a brand of lens.

     1.1 The dominant and recessive markers

     On the surface of the lens are generally two kinds of explicit and implicit tags. As the name implies, dominant markers are available directly observed the naked eye, and the need to wipe out the; and hidden tags, you need the help of sunlight or the light to see through the careful identification and retained in the lens in a lifetime. Figure 1, a black mark for the dominant marker, and the white mark was hidden.

     1.2 The role of dominant marker

     a. glasses Cross: If IPD and the pupil of high measurement accuracy, glasses and customer cross is the corresponding pupil. Thus, by observing the mutual glasses Cross and the position of the pupil may largely determine the accuracy of measurement. So, together with the glasses, including all dominant marker cross, we must wait until after the customer tried on before and no apparent problems wipe out.

     b. Reference circle far: 4mm at the top in cross glasses. Far from here with the luminosity measurement lens is the most accurate.

     c. prism reference point: at the bottom of glasses 4mm at the cross. As progressive multifocal lenses above and below the degree and the thickness is inconsistent, from the aesthetic point of view, to obtain the thickness of the top and bottom are basically the same, and thus processing in the garage down the bottom will be a prism. In general, the degree of prism lenses under the same number of additional luminosity is directly proportional to the luminosity increases the number of under about one-half to two-thirds. Through the prism reference point to measure accurately the actual prism lens degree, its significance is that if two prism lenses for more than 2 degrees, then the customer is more difficult to adapt.

     Near circle d. Reference: the reference point at the bottom of the prism. With much the same with the reference circle, near the lens with a reference circle is a measure of the degree and with ADD near the most accurate place; In addition, customers look through the recent past are mainly used for reference circle of view, therefore, the choice of the frame, processing signs of the times necessary to note, should be the almost complete circle with reference to preserved, otherwise they will see almost a direct impact on the visual effects. Near circle with reference to the general diameter of 4mm.

     e. Dispensing Height: Cross from glasses to nearly one-half circle with a reference at the call of the glasses lens height, this is a very important concept, in the frames of the selection and the measurement of high pupil has a very important significance. For example, a brand of glasses lens height of 18mm, retained the top if the glasses Cross 10mm, some of which look far for the 10mm, should select at least how much vertical height of frame was appropriate? A simple calculation of the 10mm lens glasses with the height of 18mm, plus nearly half circle with a reference that is 2mm, the height should be selected at least 30mm or more had just the right frame. Similarly, if a glasses lens height 14mm, select the height can be 26mm or more frames. Therefore, the smaller the height of glasses, then the more broad selection of frames. Similarly, high pupil must be equal to or greater than the selected height with 2mm lens glasses before, or only re-select the frame or change the location of wear.

     f. level of marking: Cross in the glasses and the prism reference point on each side of the two levels of short-term, these four short-term will help us determine whether the installation of the lens in a horizontal position and whether there are tilt.

   1.3 The role of recessive markers

     a. Invisible Marking: In the prism reference point on each side of a small circle, known as stealth engraving. The two stealth engraved on the handling of complaints will play a significant role. As shown above, the distance between the two Stealth Marker is 34mm, while the average separation of the prism reference point, each hidden from the prism reference point engraving is 17mm. Because the prism reference point from all dominant markers are fixed values, so long as the two Stealth Marker to find out, can wipe out all of the dominant marker to be fully restored it. The process of recovery does not require holding a dominant marker ruler to measure, with a call measurement card (Figure 2) tools can be marked out of a very easy recovery.

Analysis of daily disposable contact lenses health index

In recent years, the international contact lens market, proposed a "shorter, the health" of the wear concept, daily disposable contact lenses as the shortest time to change the type discarded by the more attention. Many people ask why the daily disposable contact lenses is more healthy, in throwing, throwing half of contact lens quality is poor and other issues. In fact, "the shorter the more health" is not to say on throwing, throwing half of inferior product quality, daily disposable, daily disposable contact lenses but has its unique advantages.

 Daily disposable lens replace the name suggests is a daily, is the most convenient and easy way to wear contact lens products. And for the health of ways, daily disposable contact lenses there are three points:
CIBA throwing every day, daily disposable moist type
CIBA throw every day, 10-Pack Hydra
Moist and cool and bright day disposable Bausch & Lomb
Bausch & Lomb clear atmosphere at throwing 30 Hydra HD equipment
1, daily disposable contact lenses compared with other disposable products, eliminating the need for lens care work, abandoned by new ones every day, do not worry about the lens protein precipitation or accumulation of other substances, the most effective way to avoid infection or inflammatory eye disease .
2, daily disposable lenses designed products are the basic pattern of high water with high oxygen permeability, improved wearing comfort and full of oxygen. And because it is a daily replacement lenses, so lenses moisture is also good to wear in a reasonable period of time to worry about dry eye problems.
3, daily disposable contact lenses to life more convenient. Daily work, whether learning, or business travel and so do not worry about forgetting your partner does not care or temporary box solution saved the lens and so on, make life even more confident.
Now on the market, many brands have also introduced a daily disposable products, such as Johnson & Johnson, CIBA Vision, Bausch & Lomb, Hai Chang, cool, and so have the daily disposable contact lenses Parker products, including Johnson & Johnson and CIBA Vision are based mainly short throw brand, in the daily disposable products also have some advantages.
 
Some say the price daily disposable contact lenses every day new ones will be more expensive, the problem is to adjust the major brands are also many value the introduction of affordable specification packaging equipment is to bring more benefits to consumers, the price increase . So, daily disposable contact lenses is not a blind high prices, the premise of ensuring the health and comfort, the high price is worth it to choose.

More reading:The origin of contact lenses

Glasses is not the treatment of myopia, but the correction of myopia

While the eyes of love in our eye has been given enough attention, but the crowd is still on the rise of myopia, wearing glasses more and more friends. As for the glasses, there are many more errors, for example, many people think glasses are used to treat myopia, it is not true, not through the spectacles to treat myopia, glasses only multifocal lens correction of myopia, myopia treatment Required by the relevant surgery.

The so-called myopia, is a refractive error is in the Qu Guangjing only under the premise of the retina distant objects can not be together, and in the formation of the focus before the retina, showing near objects as clearly as distant objects blurred. More than 600 degrees of refractive myopia, that is a high degree of myopia. Myopia is the use of a contact lens glasses are the principles, the focal point to the correct position correction, vision correction.

From the current market point of view, glasses are daily disposable lens and contact lenses into two categories. Frame glasses frame and lenses is composed mainly rely on vision correction lenses, glasses lenses are glass lenses, polymer resin lenses, PC lens, etc., the lenses of different materials have different characteristics and advantages. The contact lens is the recent popular types of glasses, which removed the shackles of the framework, and the approximate size of the eye and eye phase directly at the lens and improve the aesthetics of wear.

Whether wearing glasses or contact lenses framework, should be carried out in the early eye specific vision, which means that the eye myopia understanding of the situation. The degree of glasses is the general degree of lens Quguang Jiang expressed in degrees. A diopter (dioptre), equal to 100 degrees.

Moreover, even if wearing glasses friend, in the usual daily life still have to pay attention to habits and eye health, prevent vision loss, eye health care.

To read more about contact lens, refer you this blog:The contact lens in Singapore