Lens is a disposable product, once processed and made, can not modified, to avoid the loss can made, should be  consider the correct choice.

Select lens essentials: according to their work, life needs,choose the performance of glasses should have, in the choice of glasses corrected vision, use distance, and glasses degree, but also should consider the different performance characteristics of different lenses.

1. Lens color

People who have high visual requirements for vision, color, and distance, such as students, car drivers, surgeons, and artists, should choose clear and colorless lenses. If the driver puts on the lens with heavy color, he is not sensitive to the change of distance and does not judge the distance accurately, which is easy to cause accidents.

2. The shape of the lens

The shape of the lens depends on the shape of the frame

3. Light transmittance of the lens

Optical lens with multilayer anti-reflection film, colorless optical lens and aspheric surface ultra-thin optical lens have better transmittance.

4. Thickness of lens

It is related to the size of lens diopter, the refractive index of lens, the size and shape of lens frame, the distance between pupil and light center, the axial position of astigmatism, and the properties of lens (concave and convex).

5. The weight of the lens

Related to lens materials, glass lenses are heavier than resin lenses. The same lens material is heavier than the major one and weighs less than the specific gravity, and the larger one weighs less than the volume (depending on the lens strength and shape).

6. Hardness of the lens

Glass lens than resin lens hardness is high, more wear - resistant.

7. Lens strength

Resin lens than glass lens strength, impact resistance is not easy to break.

8. Special functions of lenses

Such as anti - ultraviolet, anti - electromagnetic radiation, anti - infrared, high temperature, oil, acid and alkali resistance, anti - dispersion, anti - deformation (ultra-thin aspheric lens), anti - glare and other functions. Such as electric, gas welding lenses, computer lenses, underwater lenses, fishing lenses are different.

The above key points are very important for choosing a good lens. Do you remember them clearly?

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As for optometry, some people don't pay attention to it. Some people have some misunderstandings. Today, I'd like to talk about some common sense of optometry, and I hope you can treat it scientifically and correctly.

1, glasses fitting, generally follow the principle of the best vision maximum positive mirror.

Maximum positive :

To myopic patient points to can achieve optimal eyesight namely (1.0) when the lowest myopia degree is number, when ensuring the eye sees far already so clear and bright, see close again won't overfatigue. For patients with hyperopia, it is the highest degree of hyperopia at the time of optimal vision (1.0).

To myopic patient points to can achieve optimal eyesight namely (1.0) when the lowest myopia degree is number, when ensuring the eye sees far already so clear and bright, see close again won't overfatigue.

For patients with hyperopia, it is the highest degree of hyperopia at the time of optimal vision (1.0).

2, corrected visual acuity refers to monocular corrected visual acuity, monocular corrected visual acuity has reached 1.0, binocular corrected visual acuity may be 1.2, sometimes do not need to often use the eye patients to correct visual acuity to 0.8.

3, there is a principle when matching glasses: myopia mirror rather than shallow, not deep, correct to 0.9 to 1.0 is appropriate; Farsightedness mirror should "give enough", it is how many degrees match how many degrees.

4, glasses is not corrected the higher the better, some myopia patients hope to get glasses to correct the vision of 1.5, that the higher the better, in fact, will damage the eye's regulatory function, causing visual fatigue.

5, some patients hope to correct visual acuity does not reach 1.0, afraid to see the more clearly the increase in myopic degree faster, this is also a misunderstanding, long-term will deepen the degree of myopia

7. Myopia can reach 1.0 or above through lens correction. If it does not reach 1.0 or above, there may be several problems:

Glasses are not well matched there is myopic amblyopia there is myopic fundus change there are myopia complications

The glasses don't match

Have myopic amblyopia

There are myopic fundus changes

There are nearsightedness complications

8, choose to go to a regular eye hospital with optometry glasses is very necessary.

Doctor reminds: optometry adds lens to want to choose normal hospital, minor degree grows fast, want to see a doctor in time, adult a pair of eyes is most multifunctional two years should be replaced in time.

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The whole process of buying a pair of glasses includes

1. Detect the accurate luminosity of eyes and find potential problems

2. Recommend suitable products with prescription

3. Processing and manufacturing

IV. after sales

Possible risks of online shopping

Is the product a qualified optical product

Whether the processing is qualified or not is suitable for the thing you choose.

If it's all right, congratulations on saving money

Why is it cheap? Because online is just a part of buying products. The other link is to take the ride of physical stores.

In order to promote the effect of free optometry free frame or lens free processing free, all the values are reflected in a product. Then compare this product with the Internet, it's really profitable.

So can these really be free? Obviously not, but the core value of glasses is these free. The product itself is not so valuable. The professional services and shopping experience you enjoy in the physical store are valuable.

If you sell glasses as a regular product in the future, how much more money and time will it take you to enjoy these free products now. (you can find out how much optometry charges in some developed countries and how long the period of lens taking is)!

Of course, everyone wants to save money. If you know your accuracy, and the degree has been stable, and the quality requirements are not high, you can choose a shop with high evaluation to buy online.

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Do you have any idea? ! Not everyone can be a superstar with sunglasses on.

We all know that men don't accessorize as much as women do! Even with the new designs coming out year after year, there are still a few of them. If you look at it from a practical point of view, the glasses are the most attractive. No matter flat glasses or sunglasses,  always can more or less change the image temperament. The following is to provide you with the men's glasses and face matching skills, according to their own face shape.

square face

Men with Chinese characters often pass a square face full of masculinity. This face shape has wide cheeks and square and straight cheekbone angles. It gives people a sense of hard lines and may look too rigid. SO, stop picking square frames!! Can choose more frame, let the face look more downy, moderate too wide cheek. Round/oval full frame, half frame are extra points style oh.

Black metal leg frame Ray Ban

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A round face

Round face of the man is not appropriate to wear round or curved glasses, round  frame line on the round spectacle frame, will emphasize the appearance of the round , the lack of aesthetic feeling, therefore, should choose the quadrangle spectacle frame. A round face is short except round. So the frame should not be too high, nor too wide, the face too much to cover, will appear childish and funny. Similarly, if the mirror foot position is higher, also has "lengthen" the face effect. Short frame, no frame, half frame have decorated effect.

Recommended style

Prada on a black frame

Black metal mirror leg frame Dita

With a narrow upper and lower tip, a narrow forehead, thin cheeks, wide cheekbones, and a narrow forehead -- if your face fits that description, you're definitely a "diamond face." When this kind of face is choosing lens money, narrow edge lens money needs to notice, such lens money is not quite appropriate. And the reader of diamond face model, more appropriate ellipse or frameless frame design.

Recommended style

Black frame Cutler and Gross

Black frame Starck

Heart-shaped face

The heart-shaped face, also known as the legendary awl and melon shaped face, is characterized by a broad forehead, prominent cheekbones, and a narrow, pointed jaw. Up and down is not balanced on exterior of this kind of face form, avoid to choose to have the glasses with too much messy design as far as possible so, in order to balance the visual experience of integral facial ministry, nevertheless nippy bouncing colour is ok try to see. At the same time, the frame of the half frame is also appropriate style, weakened the line at the bottom of the frame, will not appear more pointed chin more narrow. Finally, there is a safety criterion, the width of the frame of the heart-shaped face should be appropriate with the total width of the face, never too wide oh.

Recommended style

Black frame Versace

Prada on a black frame

By the word face

This kind of face is compared in the place above cheekbone narrow, the place of temple is a bit sunken go in, feel cheek fleshy, cheekbone is taller. For this kind of angular face shape, it is very suitable for round and oval frames to soften the more rigid lines of your face. Avoid wearing round, rectangular frames.

Recommended style

Black metal frame frame Ray Ban

Black metal frame frame Thom Browne

Black metal frame frame Cutler and Gross

Oval face

Oval face is also known as oval face, oval face face is longer, there is a round chin and high cheekbones, there is no defect, belong to the perfect male god face! An oval face does not need to be masked by the shape of the glasses, so any glasses are appropriate. The metal lens that thinner frame wears not only can decorate facial model and facial features more stereo, also can give you to add a few ability and trustful feeling. Thicker brunet frame also is the design that oval face suits, partial round picture frame can appear you have artistic temperament very much, folk square can add a few hale line feeling for facial ministry.

Recommended style

Black frame Moscot

Wide edge mirror frame Dita

Long face

This shape of face gives the first impression of personality and is therefore very attractive to the outside world. A long face is good for bangs, to hide the fact that the face is too long. Curly hair, for example, would look more natural if it were Shared with bangs. In order to balance the vertical and horizontal ratio of the face, you can choose a slightly wider frame than the face, which looks more spiritual and aura, easy to highlight masculinity.

Recommended style

Warby Parker Chamberlain, tortoise shell frame

Thom ford, black frame

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The schoolgirl that wears glasses is not humorous, but in recent years much get each big brand to support, the glasses that abandoned rise to become fashionable sheet to taste , become a kind of new tide.

Adornment is chosen good, can add points for appearance, fashionable girl should learn to choose the  frame that suits herself first.

The Cat - Eye Glasses

Big cat eye frame is returned, besides grace, cat glasses have the utility that modifier outline.

Because the cat eye frames have upturned lines, it is very beautiful.

If monochrome glasses are too common for you, tortoiseshell is better. Tortoiseshell glasses are always the best choice.

If you agree, then these decorative frames are for you!

Except for art's sake, Alexander McQueen, Gucci, Chloe and other brands are also offering decorative frames this season

The birth of aviator glasses is really closely related to aviator. The goggles were designed for aviator in stratosphere by boshlan company in that year. They were made of tear drop type design and light metal frame.

In contrast to the up design of the cat's eye frame, aviator glasses has a drooping design on both sides of the lens, which will make people focus on the lower half of the face, so it is also more suitable for girls with sharp chin, while those with short and wide face should be avoided as much as possible.

Retro Glasses

As for a pair of entry-level and not too exaggerated glasses, the first choice must be nostalgic classic style.

Because its frame is generally thick and classic in style, it doesn't choose face shape, and it's still a classic design that can't out, so it's relatively easy to control and match.

Oversized Glasses

The reason why oversize style frames have returned to the fashion world is attributed to Gucci. In recent seasons, at the Gucci conference, male and female models have put on a pair of oversize metal frame styles, which have a strong retro color and send out a fashionable cultural atmosphere. Because the oversize style frame can cover most of the face, it naturally has a small effect on the vision.

Glasses can also be very fashionable. There are many kinds of frames. There will always be one that suits you best.

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