How do they test for bifocals?
Sun, Apr 10, 22 By : Koalaeye
How to Perform Glasses Measurements? If there is no number on the temple of eyeglasses, you can perform glasses measurements by yourself. Now, we will show how to do that. To measure the glasses’ size, you need to prepare a ruler or a tape first. To measure the frame width, measure the entire horizontal front of the frame, from the furthest extended point on either side. As for lens height, you should measure the vertical height of the lens. As...

How to Perform Glasses Measurements?

If there is no number on the temple of eyeglasses, you can perform glasses measurements by yourself. Now, we will show how to do that.

To measure the glasses’ size, you need to prepare a ruler or a tape first. To measure the frame width, measure the entire horizontal front of the frame, from the furthest extended point on either side. As for lens height, you should measure the vertical height of the lens. As for the bridge, you should measure the part that goes across the bridge of your nose. The temple arms include the front of the frame on either side and the rest behind your ear. The lens width is the horizontal diameter of one lens. So, when measuring these, you should be careful.

After that, you have measured the glasses frame size. If you want to know whether your face is right for this frame, you can read the post: How to Measure Face for Glasses Frames - 7 Steps

If you need a pair of new glasses, you can try Koalaeye glasses. They are stylish and cheap and they are lots of available choices.


TERAISE Polarized Clip-on Sunglasses Over Prescription Glasses

The use of a yellow night vision clip helps reduce the glare of other vehicles' lights effect, and a nearsighted night vision clip can improve the safety factor of night driving. You can wear myopic prescription night vision glasses for a small amount of money, saving at least $350 / euro. It only weighs 4 grams. With a strongly polarized lens, the glare can be weakened, simple, and beautiful. On cloudy, rainy, or foggy nights, it's safer to wear a night vision clip. They have 18 months of quality assurance and comprehensive customer service.



How To Choose Better Night Driving Glasses?

Choose and buy glasses to use a special night with anti - strong night driving lens. The demand is to block 80-90% of the strong lights and harmful lights, and at the same time to make the road more clearly. Choose glasses with thicker lenses, they are more durable and protect the eyes of drivers against irritation and accidental breakage. As common sunglasses and color-changing glasses are only suitable for daytime wear, wearing them at night will seriously affect the driver's vision.

Common light yellow night driving glasses can only block a small amount of light, and is not very suitable for night driving glasses standards. Therefore, in the choice of lenses of night driving glasses, we must do the selection and demonstration of the national authority of the formal institutions to test products, to achieve the desired effect in actual use. Don't buy products that are not up to standards from vendors. Such products not only do not block the lights but may affect the driver to see the road ahead, affecting the safety of the train operation.


Different types of nose pads for glasses

The fixed nose pad is usually used on the plate frame. The nose pad and the frame form an organic whole. The maintenance is more convenient, unlike the movable type that should often twist a screw. It is not easy to hide dirt and dirt. But the disadvantage is that the angle of the nose pad can not be adjusted, and it can not fit the bridge of the nose greatly. The movable nose pad can be automatically adjusted up and down according to the shape of the bridge of the nose to ensure that the compression part of the bridge of the nose is evenly stressed and the local pressure is reduced. But the disadvantage is to often check the tightness of the screw, but often scrub clean. The silicone material usually used in the nose pad is easy to yellow after a long time, which affects the appearance.



Shopping Skills of Blue Light Blocking Glasses

Some shop assistants recommend green-blue light-blocking glasses, explaining that the principle of tinting lenses is different and that you should be careful because green can not really block blue rays. There are blue-light-blocking glasses that are blue. And this belongs to blue light protection with no background color, which can not completely prevent blue light into the eye, usually only 20% to 30%.


Sunglasses For Different Face Shapes

The round face is what we usually call the babyface. The facial lines are relatively round. What kind of sunglasses is suitable for people with this face shape? First of all, you cannot choose a large lens. It does not mean that a large lens can cover a big face. You should choose a dark square lens. A round face and a round frame are both enemies. And putting them together will make a person's face look rounder, so try to avoid round frames.

For the square face, the cheekbones and the angle of the mandible are relatively square, and the chin is shorter and well-defined. This kind of face shape must first avoid square frame sunglasses because it will make the face wider. You can choose dark square round sunglasses and cat-eye sunglasses, you can also choose a long and narrow line of aviator sunglasses, the width of the frame is slightly larger than the width of the face.

The long-faced people should choose big sunglasses that can cover the face, and shorten the face. Also choose a darker color, which has a good occlusion effect. The Aviator sunglasses are the most friendly style for people with long faces.

The oval face is also the most popular oval face, the traditional beauty face. The young lady with this face shape can choose sunglasses at will. There are no defects to cover, so you can choose boldly and safely. But don't choose which ones are particularly exaggerated, which are too eye-catching.

The best way to choose sunglasses is to go to the optician to try them on. According to your own preferences, try a variety of styles so that it is easier to see which one is more suitable for you. There are a lot of sunglasses for us to choose from. In order to enhance our beauty, we must choose the most beautiful sunglasses that suits us.



Can clear lenses be polarized?

At present, there are no clear polarized lenses. A polarized lens is a thin film vertically arranged with silicon crystal coating placed inside the lens, just like a shutter, which covers the parallel light and only allows the vertical light to pass through. In this way, the glare from all directions can be eliminated, so it is clear and comfortable to wear. Transparent polyamide, the material of nylon lens, is a new variety of polyamide. The material of the nylon lens is mainly transparent polyamide. Due to the effect of the light filter, only light from a specific direction is allowed to pass through the lens, which filters the dazzling light from the sun on the water, land, or snow very well. It can not only make the landscape soft, clear, and natural but protect the eyes to a certain extent.

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