When buying glasses, most people pay attention to the beauty of the style first, but ignore the comfort. In fact, fit means not only to wear beautiful, but also to wear comfortable. Although some people only wear it for decoration, most of them wear it for correction of vision.

When matching glasses, try to wear them. One is the process of running in, and the other is to find problems in time. Unsuitable glasses are not only uncomfortable to wear, but also may increase the degree, so we must pay attention to them.

Don't look at glasses is just two frames + two lenses, but there are still some small ways to choose. This way is divided into five steps: check the light, select the lens, select the frame, look at the style and look at the face shape.

1. Check the light

Optometry is the basis of lens matching, mainly to check the deformation of the eyeball. Generally, there are two methods: one is to use an instrument to check the deformation of the eyeball, commonly known as "computer optometry"; the other is to use a lens to try on and use a pair of interchangeable glasses, also known as "insert optometry". After determining the degree of glasses to be worn, a suitable pair of glasses can be fitted. Large opticians use both methods.

Computer optometry

Computer optometry belongs to objective optometry. Its principle is basically the same as retinoscopy. Infrared light source and automatic fog device are used to relax the adjustment of eyeball. Photoelectric technology and automatic control technology are used to check the diopter.

Insert optometry

However, the results of computer optometry may be inaccurate due to the improper operation and subjective bias of the optometrist, as well as the quality of the machine. So it is very necessary to insert the film for optometry after the computer optometry, and then combine with the individual actual use of eyes and other comprehensive situations, the optometrist gives a prescription for matching glasses.

2. Pick lens

There are four points to choose a lens: material, shape, dispersion coefficient and refractive index.

texture of material

At present, the lenses sold in the market are divided into three types according to the materials: glass, resin and PC. Glass lenses are relatively easy to break, posing a threat to eye safety. Although PC lens has super toughness, is not easy to break and has the lightest weight, it is not resistant to high temperature and is easy to be deformed by high temperature. Because of its advantages of light weight, not easy to break and low price, resin lens is a common choice for myopia glasses wearers.

appearance

Lenses are divided into spherical and aspherical lenses according to different curvature. Spherical lens refers to the lens with spherical surface on both sides, or one side is spherical surface and the other half is plane. The surface shape of aspherical lens is determined by the multi image higher order equation, and the radius of each point on the surface is different. The aspheric design of the lens is a kind of complement to the disadvantage of the spherical design of the lens (aberration). In addition, the curvature of the lens is reduced, the thickness of the lens is reduced, and the glasses of the wearer look closer to the reality.

There is no difference for people with low degree, but for people with medium and high myopia, it is recommended to choose aspheric lens, which has better imaging effect and sharpness.

Dispersion coefficient

Dispersion coefficient is an important index to evaluate the sharpness of lens imaging, which is usually expressed by Abbe number (dispersion coefficient). The larger the Abbe number, the smaller the dispersion and the better the imaging resolution. On the contrary, the smaller the Abbe number is, the larger the dispersion is, and the worse the imaging resolution is.

Refractive index

The concept of refractive index is a little complicated. Let's simply say that the common refractive indexes are 1.56, 1.60, 1.67 and 1.74. Under the same degree, the higher the refractive index is, the thinner the lens will be. When selecting, it is not the thinner the better. You can select by referring to the degree: 1.50 or 1.56 for less than 200 degrees; 1.60 for 200-400 degrees; 1.67 for 400-800 degrees; 1.74 or glass lens is recommended for higher degree.

3. Selection frame

If you buy the wrong frame, no matter how good the lens is, it's a white tie. Because when the mirror frame is bought wrong, the distance between the eyes and the rake angle of the mirror will be wrong, and the two data are wrong. If the wearing time is long, the degree will definitely increase, and even other complications will occur.

Look at the nose rest first

To select a suitable mirror frame for Chinese people, first of all, it depends on the nose bracket. The nose bridge of Chinese people is generally short, so you can buy a large space S-shaped nose bracket, which can refer to the above figure.

If you want to choose a fixed nose rest, it is recommended to purchase a 9 mm or 12 mm high nose rest specially designed for Asians.

Look at the mirror leg again

There are also spectacle legs, which are suitable for Chinese people. Usually, if we see those glasses legs without radian in the glasses shop, it proves that they are foreign trade funds sold to European and American people, and are not suitable for Chinese people.

4. Look at the style

Usually, a pair of glasses is composed of frame, lens, leg, crossbeam and nose pad, but the real element determining the line of glasses is actually the line of frame and crossbeam. According to the line presentation of these two parts, glasses are usually divided into five types. Let's take a look at them together.

Full border

Full frame means that the frame completely covers the lens, and its line type is mainly determined by the frame and the beam.

Half border

Half frame means that the frame only covers a part of the lens. If there is a beam, the line is determined by the beam and the frame of the upper half; if there is no beam, it is mainly determined by the frame of the upper half.

no border

No frame naturally refers to the frame without frame. The line sense of this kind of glasses is much weaker than that of other frames with frame, mainly based on the shape and line of the lens itself.

Bezel

The bezel frame refers to a rectangular plastic frame, which generally has no nose pad, or the nose pad is not obvious. The frame is generally thick and has a strong sense of line.

Eyebrow crossbar frame

Eyebrow side crossbar frame means that there is a crossbeam in the middle of eyebrow, showing the appearance of double beams. The lines of this type of crossbeam also have a great influence on the shape of glasses.

5. Look at face shape

Glasses are not only the necessity of a clear world, but also a sharp tool to modify the shape of the face. The effect of wearing glasses is different for different face types. So when choosing, you can choose according to different face shapes.

round face

Round face gives the impression that people are easy to get close to, and the corresponding disadvantage is that it is easy to show big face. Therefore, when choosing glasses, try to avoid the round or oval shape. It is more suitable to choose the square frame with edges and corners, which can weaken the round lines and make the face more delicate.

Square face

The biggest feature of square face is its clear outline, which can easily make people feel cold and hard to get close to. So at this time, we need some round lines to soften the lines. The round or oval frame is very suitable for this, adding femininity and affinity.

be a credit to

The long face has a sharp chin that many people admire, and a wide flat forehead, which presents an inverted triangle shape as a whole. The wide frame and dark leg can break the straight line of the long face, shorten the longitudinal length, and make the overall contour more harmonious.

So whether you wear glasses to decorate or correct your eyesight, you should be responsible for your eye health, do every step carefully, comfortable and beautiful, which is the real meaning of choosing glasses. Have you all learned? 

contact prescription to glasses， 

prescription glasses meaning，

 prescription glasses chart，

 prescription glasses axis，

 Muukal |Affordable Eyeglasses online， 

www.muukal.com

You found a beautiful pair of frames that compliment your face. You love them.  But you don’t love it when they create discomfort. Sometimes our favorite glasses can cause nose pain, nose marks, eye strain, and can even cause pain behind your ears. The first step to avoiding these eyewear annoyances is having glasses that fit correctly. That’s why it’s so important to work with a professional who can fit them properly to your face.  Incorrect fit is usually the biggest reason why your glasses can cause discomfort.

But even when your glasses fit as well as possible, minor issues can arise. Here are some tips to help deal with these common sources of discomfort.

Nose Bridge Pain

Glasses that fit well should sit securely on the bridge of your nose, without pinching it. The frames shouldn’t press into your face even when you’re nodding, shaking your head, or bending down. If your glasses are pinching or shifting around, it’s possible your fit is off. If pain is a persistent problem first visit an eye care professional to ensure your fit is right.

Typically, plastic frames are built to rest directly on the nose, while metal frames use supportive nose pads to distribute weight more evenly. However, the nose pads must be set to the correct bridge size to fit correctly and the nose pad material can also be a contributing factor.

If nose pads are not positioned flush against your face they can dig in causing pain. A fit adjustment may be all that is needed to solve your problems. Your optician may also be able to switch the type of nose pad, perhaps moving from silicone to acetate or vylon.

Even with a secure fit, some glasses frames are heavier than others and the weight alone can contribute to nose pain. When you’re shopping for glasses talk to your eyewear professional to find out about options for lightweight lenses and frame materials.

GET ADJUSTABLE NOSE PADS

Nose Pad Prints

Most glasses wearers have experienced those little indentations that appear on your face when you take off your glasses. Those marks can be a lasting remind of discomfort.

One way to prevent these marks is to remove your glasses periodically throughout the day. Removing your glasses frequently allows your skin to breather and massaging those marked areas can help diminish them.

Once again, finding the right nose pads may also be the solution If your glasses aren’t fit well with the nose pads in the right place that may be exacerbating the problem.

Pain Behind The Ears

When you feel pain behind your ears while wearing glasses it may be because your glasses are too small for your head and/or incorrectly adjusted.

Ear pain from glasses that are too tight can cause headaches due to poor circulation. To ease this pain, visit an optician to adjust your frames or help you find a pair that better fits your face. If your frames are fit correctly, eyewear cushions might be an option for discomfort resulting from long-term wear.

While glasses frames can be adjusted to fit a variety of head sizes, not all frames are right for everyone. Some eyewear designers offer frames in varieties like petite, plus size and alternative fit to help meet different needs.

Wearing Glasses with Headphones

We all want to have our music. But wearing glasses with headphones can be extremely uncomfortable. Yes, earbuds are an option, but if you love over-the-head headphones like Dre Beats, what can you do?  

Glasses with thin frames will likely fare better against noise cancelling pressure. Looser headphones, that let in more outside noise, might be more comfortable. The thickness of the ear pad may also make a difference, so look for headphones with thick, plush ear pads.

Eye Strain

Looking at a computer or a T.V. for too long is a common cause of eye strain, blurred vision and red eyes. If your job ties you to a glowing screen, computer glasses can help prevent eye strain.

Computer glasses are different than regular eyeglasses and reading glasses. When you’re on a computer, the screen is usually positioned 20 to 25 inches from your eyes. People who need prescription glasses are usually prescribed single vision lenses, which correct nearsightedness, farsightedness and/or astigmatism.

Computer glasses are lenses that are designed to reduce glare, increase contrast, and maximize vision. There is an anti-reflective coating which reduces the glare  coming from screens and other light sources. Tinted glass helps to maximize contrast. They are available as single vision, occupational progressive lenses and occupational bifocal and trifocal lenses.

Not everyone needs computer glasses, though they can be useful for glasses wearers of any age. But if string at a computer gives you eye strain, and it can’t be avoided, bring it up when you’re getting glasses. As always tell your eye care professional about any sources of pain or day to day job requirements to find out if computer glasses are a good answer.

No one should be uncomfortable in their glasses but sometimes it’s more than annoyance. When discomfort is a symptom of poor fit there’s even more at stake. When your glasses are crooked or slide down your nose, the angle of your vision changes making your vision through your lenses less accurate.  Irritation from glasses is always unwelcome, and there are often simple solutions for your discomfort. Most of them you can find at an eyewear store, though you may have to ask about the headphones at a Best Buy. Glasses are a fashion statement, and yes they say beauty is pain, but when it comes to your frames, it shouldn’t have to be.

I've been wearing glasses since 11, and TBH the struggle is real when it comes to keeping them comfortable 24/7. From nose pinching, to behind-the-ear hurting, to slipping and sliding, to simply appearing crookeds. Not to knock eye doctors by any means, but you can imagine how thrilled I was when I found some hacks that make wearing glasses more comfortable. And guess what? All of these tips are super simple and none of them require hitting up your doc on the regular.

I mean, as much as I'd casually love to pull a Hermione Granger in that scene where Harry Potter's glasses broke, and magically fix all of my eyewear woes, unfortunately, that just isn't real life, fam. (We can all dream, though). If you’re in the same boat as me and know the eyeglasses struggle all too well, I compiled a list of things you can do right now to make your pair feel a whole lot comfier. Keep them handy the next time your glasses loosen up on you or your nose pads are feeling a bit too tight. You can thank me later.

1. Use A Hair Dryer To Tighten Plastic Frames

Let’s get real: If your glasses are sitting too low on your nose, it can feel uncomfortable AF. But there is a solution to ensuring your plastic frames are more snug, and it requires a hair dryer. According to LIVESTRONG, you can actually warm up the temples of your frames for 20 seconds with a hair dryer, and then bend them to adjust accordingly.

If you're living that wire-frame life, you don't have to worry either. According to EyeBuyDirect, simply use your thumbs to push the nose pads closer together. This will keep them snugly against the sides of your nose.

2. Adjust The Nose Pads On Your Metal Frames If They Feel Too Tight

There's nothing cute about nose pinching (and I'm not talking about the kind your grandma does when she tells you you’re her favorite grandchild in the world). If your metal frames are pinching your nose, you can pull the nose pads away from each other a bit (delicately, of course), according to Frames Direct.

3. Look For Slippage

If you're constantly pushing your frames up on your face, it might look like you're giving everyone around you the finger. (Yes, it's happened to me and I don't want to talk about it.)

For this, you'll have to invest in a tiny screwdriver to tighten the screws on each side of your frames. This CVS Health Eyeglass Repair Kit is a great purchase, as it comes with four screw sizes to fit a good majority of frames.

4. Correct Crookedness

For fixing crookedness on wire frames, wikiHow suggests gently bending the arms with small pliers to straighten them. On the other hand, plastic frames will need a hair dryer or a quick run under warm water to become pliable. Once they seem to be even, put those bad boys back on and check yourself out in the mirror to observe your amazing artistry.

5. Break Out The Baby Powder

Lastly, if you're new to the glasses lifestyle, you might find that the skin behind your ears is a bit sore or tender. Money Versed recommends breaking out a bottle of baby powder and applying it behind your ears daily until your skin adjusts to your new frames. You'll smell fresh AF and feel comfortable. That’s a win-win, if you ask me.

All of the above hope to help you who wear glasses.

Many parents will try all kinds of ways to restore their children's eyesight when they first find their children's myopia. However, at present, if the child is really short-sighted, there is no way to reverse the development of degrees.

How to distinguish whether the child is really nearsighted?

When the eye has no degree, the distant parallel light enters the eye, just focusing on the retina, and we can see clearly. When looking near, because the light entering the eye is not parallel, the lens in the eye needs to become more convex and have a stronger ability to focus the light on the retina. But the lens becomes convex, mainly depends on the ciliary muscle contraction, that is, the ciliary muscle regulation ability.

Therefore, when the eyes are looking at the distance, they are in a relaxed state; when they are looking near, they need to use adjustment to see clearly. And long-term use of regulatory function, ciliary muscle will always be in a state of contraction, may cause fatigue or spasm. Pseudomyopia is often referred to as the fatigue of ciliary muscle.

How to distinguish true myopia from false myopia?

Answer: mydriatic optometry.

The so-called mydriasis, in fact, is to drop cycloplegic drugs into the eyes, so that the ciliary muscle does not contract. Because these drugs usually cause mydriasis, so the clinical process is called mydriasis.

After mydriasis, optometry is performed. Since the effect of ciliary muscle has been removed at this time, the true degree of the eye can be found out.

If after mydriasis optometry, the child still has myopia degree, that means that the child is really myopia, usually can not be reversed.

What can we do at this time?

Let the children develop slowly. If necessary, they should wear glasses!

There are many kinds of lenses, how do parents choose?

When the child is just short-sighted, most parents will choose to give the child frame glasses. At present, we can simply divide the lens of frame glasses into single light lens, double light lens and progressive multi focus lens.

Single lens

This is the most familiar lens, which has only one focus, including spherical and aspheric design.

In contrast, the curve design of aspheric surface can make the lens thinner and more beautiful, with less aberration and distortion, so the visual quality will be better.

Many parents like to make their children match less degrees. They think that if the degree match is higher, it seems that the degree will rise faster.

However, studies have shown that under correction (i.e. not wearing glasses or not enough glasses) and foot correction (enough glasses) are more likely to slow down the development of myopia.

Therefore, it is recommended that you try to match the degree enough to obtain the lowest degree of the best corrected vision.

Reduce the defocusing lens of peripheral hyperopia

Nowadays, many children are wearing a special kind of lens, which can reduce the defocusing of peripheral hyperopia. They think it can control the development of myopia. What's the matter with this kind of lens?

For ordinary single lens, when the image in the center of the lens just falls on the macular area in the center of the retina, the image focus around the retina actually falls on the back of the retina, that is, the so-called peripheral hyperopia defocusing.

As the focal point falls behind the retina, the compensatory lengthening of the ocular axis will be induced, and the myopia degree will increase by 300 degrees for each 1mm increase of the ocular axis.

Therefore, theoretically, reducing the defocus of peripheral hyperopia can eliminate this inducing factor and control the increase of myopia degree.

This principle is used to control the development of myopia. However, according to the published literature, the effect of reducing the defocusing of peripheral hyperopia by using frame lens is not as good as that of shaping lens.

bifocal lens

The so-called double light, in short, is a pair of lenses with two focal points.

Generally, the upper part of the lens is a normal degree lens, which is used to look far; the lower part is a lens with a certain degree added down, which is used to look near.

For example, when you look far, you are nearsighted by 500 degrees; when you look near, if you add 150 degrees, you become nearsighted by 350 degrees.

The main purpose of this design is to see near, the eye does not need to use adjustment, parallel light can focus on the retina, avoid the fatigue of ciliary muscle, so control the development of myopia.

There are indeed studies that show that binoculars have some effect on myopia control, but long-term wearing is prone to exotropia.

As our eyes are close to each other, adjustment and convergence are related. That is to say, when the eyes are used for adjustment, the eyeballs will converge inside, while wearing binocular glasses, the children's eyes will not use adjustment when they are close to each other, and the eyeballs will not turn inside. If we do this for a long time, it is easy to cause the eyes to deviate outwards and affect the normal eye position.

Therefore, in order to equip children with binocular glasses, it is necessary to add a certain degree of prism to control the normal eye position, which is the current binocular prism.

However, there is a problem with the binoculars. The degrees of the upper and lower lenses vary greatly, so there will be a jump phenomenon when looking at the distance and the near.

The emergence of progressive multifocal lenses solves this problem.

progressive lenses

This kind of lens has multiple focal points, and the design of progressive lens is gradual transition from top to bottom. So it's quite suitable for people with decreased regulation ability, that is, the eyesore.

Wearing a pair of progressive multifocal glasses, you can see far, middle and near. Since there is no obvious boundary between lenses, there will be no jumping phenomenon.

There was a time when progressive multifocal glasses were also recommended for children to wear. It was thought that reducing the adjustment of near sight can control the development of myopia, but at present, the mainstream academic circles do not agree to wear progressive multifocal glasses for ordinary children.

Because it may affect the normal position of the eyes as well as the binoculars. Therefore, in addition to children with implicit deviation, progressive multifocal glasses can be considered, and children with general myopia are not recommended to wear progressive multifocal glasses.

To sum up, for most children, the most important thing is to have mydriatic optometry first, and then to have full correction. The lens and the double prism which can reduce the defocusing of peripheral hyperopia have certain effect on the control of myopia. We can follow the doctor's advice according to the specific situation. However, progressive multifocal glasses are not recommended except for children with implicit inclination. 

 prescription sunglasses for cheap， 

prescription sunglasses on line，

 prescription sunglasses for sport，

 Muukal |Affordable Eyeglasses online

 www.muukal.com

UV is an invisible killer,

The eyes are exposed to strong sunlight,

Crystals in the eye can be exposed to too much ultraviolet light

And fiber hardening,

And the damage of ultraviolet to human eyes is cumulative,

It will develop some eye diseases,

Such as cataract, glaucoma, etc.

So what color of lens can protect the eyes most?

1 green lens

Green lens is the representative of pilot series, which can effectively absorb infrared light and 99% ultraviolet light. But green lenses can distort the color of certain scenes. Moreover, its light blocking effect is slightly inferior to that of gray lens, but green is still an excellent protective lens. Green has the function of adjusting eyesight, which is more suitable for students or people with tired eyes.

2 Grey Lenses

The Gray Lens absorbs any chromatogram evenly, so it will darken in case of strong light, but there will be no obvious color difference, showing the true natural feeling, belonging to the neutral color system. It can absorb infrared and 98% ultraviolet. The biggest advantage of gray lens is that the original color of the scene will not be changed by the lens, and the most satisfying thing is that it can effectively reduce the light intensity. Gray can reduce visual fatigue, white-collar workers with more eyes can consider.

3 yellow lens

It can absorb 100% ultraviolet light, and make infrared and 83% visible light penetrate the lens. The biggest feature of the yellow lens is that it absorbs most of the blue light. Because when the sun shines through the atmosphere, it is mainly blue light (which can explain why the sky is blue). After absorbing blue light, the yellow lens can make the natural scenery clearer. Therefore, the yellow lens is often used as a "filter". Yellow is the most sensitive color of visual cells, which can improve the sensitivity of vision. Amblyopia and other poor vision can be preferred.

4 Pink lenses

This is a very common color. It can absorb 95% of the ultraviolet light, and some shorter wavelengths of visible light. In fact, this kind of function is similar to that of ordinary uncolored lens, that is to say, pink lens has no greater protective effect than ordinary lens. But for some people, it's still psychologically helpful because they feel comfortable to wear. There are red and green color blindness or red and green weak person, can choose red lens, it can increase red and green contrast.

5 Brown lenses

This kind of lens absorbs almost the same kind of light as the green lens, but absorbs more blue light than the green lens. Brown lenses cause more color distortion than gray and green lenses, so the satisfaction of ordinary people is also low. But it provides another color choice, and can slightly reduce the blue light halo, making the image clearer.

6 Blue Lens

The beach can wear the sun blue lens, blue can effectively filter out the light blue reflected by the sea water and the sky. Avoid using blue lenses when driving, because it will make us unable to distinguish the color of traffic signals.

In addition to the traditional sunglasses, the so-called "anti radiation, anti blue light, anti fatigue, anti UV" anti blue light glasses have recently become the choice of many people.

The sunlight includes seven bands of "red, orange, yellow, green, blue, indigo and purple". Blue light is one of them, which has relatively high energy.

Blue light is a kind of normal visible light in daily life. The wavelength is about 400 nm, which just falls in the center of the eye, that is, the fovea of the macula. And this part itself is sensitive to strong light, which is mainly composed of optic vertebra cells. If it is stimulated by blue light for a long time, it will suffer some damage.

For people's concerns about the harm of blue light to eyesight, anti blue light glasses have no significant effect on eyesight protection. To protect eyesight, we should pay attention to the health eye, try not to use electronic products for a long time, and do not use the eye for a long time. 

 bamboo sunglasses， 

best baseball sunglasses，

 wood frame sunglasses，

 wooden sunglasses，

 Muukal |Affordable Eyeglasses online，

 www.muukal.com