Choose a frame for your face
People with round faces should try to avoid round frames, which can make your face look fatter. You can choose a square frame, having a decorated effect, and can make a person look more energetic. Circular lenses are recommended for square faces. Rectangular faces are also suitable for circular lenses. There are not too many restrictions on the choice of lenses for heart-shaped faces. Circular or square pieces are very appropriate, but you can choose slightly larger frames to add momentum and can create a retro sense.
The characteristics of metal material
The material of metal glasses frame chooses some kind of metal material or alloy to make mostly. Most of the copper alloys are treated as the base material and then have surface treatment processing. Then there is the recent rise of pure titanium frames and those made of memory alloy. Metal frames are usually equipped with nose pads, which are movable to accommodate a variety of nasal shapes. The end of the temple is often covered with a plastic cover, not only beautiful but also to protect the temple and skin.
What Are Glasses Without Prescription?
Nowadays, some people wear glasses not only just for correcting their vision, but also for fashion. However, for those people who do not have any eye conditions such as nearsightedness, farsightedness or astigmatism, they can wear glasses without prescription.
Glasses without prescription, also called non-prescription glasses or clear lens glasses, work as a fashion statement to add style to your wardrobe. They also may serve a purpose if they have blue light blocking lenses.
Throughout the years, many people choose to wear glasses without prescription to improve their look. This trendy accessory is a reality available in a range of designs, colors and materials that can add just the right touch to your outfit.
It is important to note non-prescription glasses have zero corrective power whatsoever, while non-prescription reading glasses offer some level of magnification, enlarging what you see up-close.
How are we nearsighted?
The light from external objects to the eye needs to be refracted by the lens before it can be imaged on the retina. The refractive power of the lens depends on the contraction and relaxation of the ciliary muscle. When we look at close objects, the ciliary muscles contract and the lens becomes thicker. When we look at distant objects, the ciliary muscles relax and the lens becomes thinner. Adjust the focal length of near and far objects so that they will show a clear image on the retina. If you use your eyes too often and the longer the ciliary muscles work continuously, the ciliary muscles will spasm because of too much tension. At this time, the lens cannot be adjusted and thinned. After the light from a distant object is refracted by the lens, the imaging position will fall in front of the retina instead of on the retina. Only a blurred image can be seen, which becomes myopia.
There is another situation. For some people, due to genetic factors, in the process of growth and development, the front and rear wheelbase of the eyeball will gradually become longer. In this way, although the adjustment function of the ciliary muscle and the lens is normal, the image formed will also fall in front of the retina due to the longer the axis distance of the eyeball, which can also cause myopia.
The two causes of myopia are different. Myopia caused by ciliary muscle spasm is called 'pseudo-myopia'. As long as the ciliary muscles are relaxed, myopia can be reversed. Myopia caused by the extension of the wheelbase of the front and back of the eyeball is called 'true myopia', which cannot be reversed and can only be corrected by myopia glasses.
What Do the Numbers on Glasses Mean?
The first number on glasses frames is the eye size. It is the horizontal width of the lenses. In general, the number of eye sizes varies from 40 mm to 62 mm in most of the spectacle frames.
The second number is the bridge size. It is the distance between the lenses. Also, it is the bridge that rests upon your nose. Mostly, the size of the bridge on glasses frames would be from 14 mm to 24 mm.
The third number is the temple length. It is the length of the stems of the frame that rests upon your ears. It can be measured from hinge to the end tip of the temple. In general, the temple length in most cases is from 120 mm to 150 mm. The bridge and temple help the frame to comfortably fit on the face.
Meanwhile, if there are no numbers on glasses frames, do not worry. You can always measure your eyeglasses frame with a millimeter ruler. Sometimes, the tiny numbers are worn off or sometimes they are printed too small that you might have to use the magnifying glasses. If you have known the glasses numbers meaning, you can choose to measure them by yourself.
At the same time, to fit the glasses better, you can also choose to measure your face for glasses frames. After knowing the suitable size of glasses, you can choose to buy a pair of glasses online. Thus, Koalaeye Optical is recommended. It is an online glasses store and provides all kinds of glasses, sunglasses, and frames. What’s more, these glasses are stylish and cheap.
Titanium is currently too expensive to refine.
It is highly demanding in buckling, stamping, cutting, and welding. The extraction of titanium, like that of aluminum before the 19th century, was quite costly and produced in limited quantities, so it was used only in extremely important fields, such as aerospace, electronics, precision instrument manufacturing, and so on.
Are rimless glasses more expensive than full-frame glasses?
In terms of brand pricing, there are several kinds of prices. For example, the cost of production should be considered. In reality, we ignore the cost of designing products by designers, the cost of workers' wages, and the cost of instruments invested in the early stage. The rimless glasses price is determined according to the material, so if you choose the material of relatively good, the price will be more expensive. In general, the eyeglasses frames are from about 50 yuan to hundreds of yuan. Of course, sometimes the price of rimless glasses is about thousands of yuan. It all depends on the material and lens. You can choose according to your own financial conditions.