How to select children's glasses?

How to select children's glasses?
Faces change as children get older, and this must be taken into account in selecting the winner. The representatives younger age person can be almost round and eyes - located close to each other, while they have enough bridge of the nose is flat and low, which could lead to some difficulties in the selection frame.

Choosing and fitting frames

Because the maximum weight glasses are ready perenositsu, it is necessary to make the selection of frames, making the so-called most-adhesion bridge (nose) frame in this place. Manufacturers excuse today can offer you a variety of samples with a flexible footbridge, a well adjacent to bridge. If chosen metal or combined with adjustable frame nosouporami, it is necessary to focus on larger elastic nosouporah for optimal weight distribution.

As a child growing up it becomes a bridge of the nose and above already, so for optimum adhesion points, the landing should be more correct to make their replacement - to do it at least once a year. Teenagers typically are chosen for the frame of the adult collections, but such a choice should check the accuracy of optics and landing size frame. Unfortunately, in this case, often face teenagers desire to sacrifice for the sake of landing correct fashion design. Teen chooses a frame, which is not really suited to it in size, but in which, in his view, it looks better. Do not go on about it, and try to explain the possible negative effects of wearing this frame.

The key point of recruiting the right frame for children of any age is the frontal width. For young clients with a broad face and a little mezhzrachkovym distance needed to pick up with a good frame of landing that provides minimal detsentratsiyu glass lenses. Always strive to be the choice of frame, Seat distance which corresponds to the maximum distance mezhzrachkovomu child. Detsentratsiya glass lenses at 5 mm can lead, depending on the recipe, thickening them to the thickness of the temporal or nasal parts and in the end - to increase the weight of glasses.

It should pay attention to the design and length zaushnikov. Regardless of the selected design zaushnika - whether standard or elastic - its basic value is the correct length. Please note that zaushniki should not put pressure on the lateral surface of the head - but only at the top of the ear. The correct length and provide a fitting zaushnikov comfortable wearing glasses and stability of the situation in the face. Longer elastic zaushniki, well secured for the ear, are recommended for mobile children of all ages, but especially for kids. Strong fleksovye joints are considered mandatory for children's frames, they provide good durability and landing points.

The development of new technologies for the production of solid and the light and hypoallergenic materials for frames greatly help frame the choice for children. Metal frames long been a leader in the manufacture of glasses at buyers of any age, including children. Magnificent choice for children's glasses are from titanium frames, as they are very strong, light, durable and hypoallergic. Frames of stainless steel for their properties compete with titanium and are also a good choice for children's glasses. It is still widely available from monelya frames, but frames remember those recommendations on the possible allergic to nickel. Very popular in the manufacture of children's glasses are plastic frames (mostly of cellulose acetate), which are represented in a wide variety of colors and designs. These frames easily adjust, it is accessible and easy to work. Recommended also frames on the basis of polyamides, which are very strong and flexible, but the truth more difficult for fitting and assembly.

Selector glass lenses

Children of all ages are very active, they are attracted to a wide variety of games and sports, which makes them more prone to injuries. To prevent eye injuries are encouraged to choose for young users glasses lens of the most durable and resistant to impact loads materials - and trayveksa polycarbonate.

Polycarbonate was opened in 1955, but the beginning of its real application in ophthalmic optics refers to the end of 1970 - ies. The sharp improvement in physical-mechanical and optical properties of polycarbonate in particular has been achieved as a result of its use for the production of compact discs, and today the optical properties of this material is not inferior to other types of plastics. The use of polycarbonate for the manufacture of glass lenses due to its following advantages: excellent crashworthiness (more than 10 times greater than traditional plastic figures - CR-39), high refractive index, light (weight - 1.20 g/cm3), effective protection against UV radiation (early in the UV transmittance area - from 380 nm) and heat (melting point - from 140 ° C).

At the same time as the rest of vysokoprelomlyayuschie materials, polycarbonate has low resistance to abrasion deterioration, and requires mandatory causing hardening coatings. Abbe number of small, which suggests that chromatic aberration, but that did not bring much inconvenience to users. Coloring glass lenses polycarbonate is achieved through the introduction of the dyes in solution reinforcement material coatings, and coatings applied, as well as on other plastic lenses. The assortment of polycarbonate lenses is extremely broad, many manufacturers supply to the market monofokalnye, surgery, progressive lenses, as well as photochromic and polarization.

Trayveks (Trivex), developed by "PPG Industries" in 2000, was specially modified and adapted for optical output. From the perspective of chemical terminology trayveks was named "kvazireaktoplast". The material consists of macromolecules involving individual spatial connection - sshivkami that allows him to combine the positive properties of thermoplastics and reaktoplastov. While the largest of refraction index trayveks applies to materials with the average value of this indicator (ne = 1,53), many see it as a promising future of organic material. The reason for this is the triad of its positive characteristics: resistance to impact loads is the same as that of polycarbonate; Abbe high number - from 43 to 46 (while polycarbonate 29-31), total weight 1.11 g/cm3, trayveks which makes one of the easiest materials to date. It should also be noted that the new material reliably blocking ultraviolet radiation up to 394 nm.

Pioneers in the production of the lenses are trayveksa company "HOYA Vision Care" (ochkove lenses "Phoenix", or "PNX" in Europe) and "Younger Optics" (glass lenses "Trilogy"). Third becomes a "Thai Optical Group", releasing glass lenses "Exelite TVX". Last year, this trio had joined the company "Augen Optics" with the lenses "Trinity" presented by the United States and in the markets of Latin America, the company "Shamir Insite" that has created advanced glass lenses "Genesis" and the company "Danae", issuing in Slovakia and Czech glass lenses from trayveksa called "Optimax". The range of designs and performances of various glass lenses of the new material is growing - so this year the company "Younger Optics" introduced in the market photochromic glass lenses "Transitions V ESP".

Goggle lenses from producers

Currently, many manufacturers produce glass lenses designed specifically for children. For example, "Rodenstock" has a range glass lenses, it is intended for production of children's points - especially in the smaller diameter glass lenses, as well as eye glass lenses "Excellit AS" recommended for the treatment strabizma in children. These glass lenses have increased segment of 40 mm and a specially matched by a physician during treatment akkomodatsionnogo convergent strabismus. For the production of glass lenses used organic materials, they have small diameters - from 60 to 40 mm, and the prismatic design developed just for small frames, as a result ensures maximum security and the ease of children's glasses. By sector of glass lenses special medical supplies for the children of the company's products "Rodenstock" can be said lentikulyarnye glass lenses asfericheskogo design, the so-called invisible transition - it is a glass lens "Perfastar 1.5" and "1.7" Lentilux intended for correction ametropii high degrees. The major advantage of such a large glass lenses useful field of vision, and lack of scotomas roundabout, which makes it possible to install the glass lenses in a variety of frames.

The company "Carl Zeiss" also recommends optics collected more points for child travmobezopasnye organic light and glass lenses. In particular, the range of products the company has a special glass lenses 50-55 mm diameter "Clarlet Mini", which are most suited for children.

The company "LTL SpA" has developed a special programme on glass lenses for children. It is known that children today spend a lot of time in front of computer monitors and television screens, so the company has created special glass lenses for computer users "Suprema Eye Guard". These glass lenses have asferichesky design and produced diameters 65 and 70 mm. They are in steady demand in the Middle East, many Arab countries as well as Europe.

"Optima Inc Company." Offers for children's glasses polycarbonate glass lenses "Resolution" positive refraction particular design. Because of technology, all glass lenses "Resolution" are 76 mm in diameter, but especially for children's glasses were proposed lentikulyarnye glass lenses with a diameter of 63 mm effective. These glass lenses produced in the range of refraction to +3.0 dp.

The company "Younger Optics" recommends for children's glasses glass lenses of the "Trilogy" trayveksa that successfully combine high impact strength and low weight with the traumatic and high optical properties. A photochromic glass lenses "Transitions" from trayveksa provide reliable protection of children from the bodies of view slepyaschey apparent brightness of sunlight and the dangerous ultraviolet radiation. Especially for children in need of bifokalnoy correction, the company "Younger Optics" offers eye glass lenses "Multiseg flat top 45" - with a width of 45 mm segment. These glass lenses missing segment offset, and in children's frames they represent almost bifokalnuyu Franklin glasses lens with a wide field of view for distance and near.

The company "Indo International" has its own special glass lenses for children - "Superkid" of a material superfayn (Superfin) with refractive index 1523. This material is the development of their own companies, he is 50% stronger than CR-39, 25% of its thinner and lighter. Goggle lenses "Superkid" produced in the range of refraction of 0.0 to -6.0 dp with 2.0 dp Cyl, 60 mm in diameter and have a persistent exclusively to education coating scratches "SuperDurkap".

In turn, the company "Thai Optical Group" recommends that for most children's glasses travmobezopasnye glass lenses "Excelite TVX" trayveks of organic material, in the range of its products have lenses with a diameter of 55 and 60 mm, which are well suited for children's frames.

In a wide range of polycarbonate glass lenses "T ilium" Company "BBGR" there is a glass lenses and 60 mm in diameter, which are recommended for the manufacture of children's glasses. The main advantage of polycarbonate glass lenses - impacting their exceptional fortitude, which makes them the first choice of glass lenses in glasses Optometrists in children. In addition, children spend a lot of time outdoors, so they need to protect their eyes from ultraviolet radiation, which also provided glasses lenses ilium "T".

"Novisia" The company proposes to manufacture their children's scores most secure polycarbonate glass lenses "Nikon Moving".

The company "Hoya Lens Europe" considers the best choice for children's glasses lens "PNX" trayveksa of which surpass glass lenses of CR-39 on the resistance to impact loads and quality, provide more protection against injuries. By order with the software can be ordered HOYALOG prescription of any diameter glass lenses, suitable even for very young consumers.

Company "Essilor International" has developed a special programme on child glass lenses, which (though not all) have already been presented and Russian distributors. The company has various types of glass lenses for children, in particular polycarbonate glass lenses "Airwear" coated "Trio", glass lenses "ORMA" 55 mm in diameter with a special coating abrazivostoykim and protection from ultraviolet radiation. It is important to understand the need for mandatory protection of the child's eye from ultraviolet radiation, as well as the lens it more permeable to these dangerous rays than the adult. All children under the program "Essilor International" are divided into three age groups: 0-5, 6-10 and 11-15 years old, and for each group recommends specific products.

Phfosforic new glasses for their children, be sure to ask the seller to explain the rules consultant care. This will help you maintain glasses in good condition and increase their life.