How Do I Know If My Glasses Are Photochromic?
Fri, Mar 18, 22 By : Koalaeye
Two Tone Thick Frame Glasses These two tone chick frame glasses are deliciously composed of two-toned acetate. The stylish oval lens frames feature a semi-transparent tortoiseshell finish melded with a creamy white. A classic keyhole nose bridge, two rivets stud accents, and comfortable spring hinges complete the concept of “wear in comfort, look in style” Darcy Operation and Requirements of Drop Ball Test The ball, which is 0.625 inches in diameter and weighs 0.56 ounces (16 grams), falls from 50...
Two Tone Thick Frame Glasses

These two tone chick frame glasses are deliciously composed of two-toned acetate. The stylish oval lens frames feature a semi-transparent tortoiseshell finish melded with a creamy white. A classic keyhole nose bridge, two rivets stud accents, and comfortable spring hinges complete the concept of “wear in comfort, look in style”


Operation and Requirements of Drop Ball Test

The ball, which is 0.625 inches in diameter and weighs 0.56 ounces (16 grams), falls from 50 inches (127 centimeters) and hits the center of the lens. The geometrical center of the lens should be struck by the ball within a circle 5/8 inches in diameter. If the lens does not break, it is called a safety lens. There can't be anything that restricts the ball from falling. It cracks across the entire thickness, containing laminated layers (if any), and divides into two or more separate sections across the entire diameter.



Type of eyeglasses cloth

There are many kinds of cloth for glasses. There is mainly sheepskin eyewear cloth, and there is microfiber eyewear cloth. There are suede and double-sided cloth and so on. Professional eyewear cloth must use more than 200 grams of weight/per cubic centimeter of microfiber. This kind of raw material chemical fiber is fine, and tactility is soft, so it will not damage the lens. This kind of wipe cloth can be used on a computer screen. The two sides of the cloth are different, and the smooth side is used to scrub the lenses. Because the dirt on the lens is mostly small. The rough side is designed to give you more friction when you touch it with your finger, so you can use it more easily, and you can clean it more.


Where can use the glasses emoji?

Glasses emojis are commonly used in glasses-related social media posts and are used to refer to things that have a point of view or demand only a little direction (for example, a museum exhibit, a movie, or a beautiful viewing platform). Although glasses have become a hot fashion accessory in recent decades, they still mean bookish or clever to a certain extent.



What is a photochromic lens?

Photochromic lenses are lenses that become dark when exposed to a particular wavelength of light (usually ultraviolet light), but return to their original transmittance and become clear when no longer illuminated by the light source. Photochromic lenses can be made of glass or resin. The discoloration effect is caused by silver chloride or other halides added to the lens, which are transparent to visible light when not irradiated by ultraviolet light. When irradiated by ultraviolet light, chemical reactions will occur, which will absorb part of the visible light and make the lens show dark. The chemical reaction is reversible, so the lens returns to its original transparent state when it is no longer exposed to UV light.


Sports goggles

With the improvement of people's sports concept and sports protection concept, sports goggles are also widely welcomed. Safety glasses are worn during sports must have four major functions, safety (PC lenses), protection (TR-90 frame, soft and flexible), comfortable (non-slip nose pads and foot covers), and beauty (match sports and leisure clothing).

Sports goggles with shatter-resistant plastic lenses and side shields can prevent balls or sand from hitting the eyes. It can be fixed on the head without worrying about falling off during intense movements. The unique design of the rim of the frame makes the glasses very close to the human face and has a proper external isolation effect so that the human eye is not easy to be attacked by bacteria. The special lens has the functions of anti-fog, anti-shock, and ultraviolet rays, which is very suitable for outdoor activities.



How Long Does It Take to Get Used to New Glasses?

Most people are excited when they get a new pair of glasses for the first time. But sometimes there is an adjustment period before your vision is fully comfortable. So, how long does it take to get used to new glasses?

In most cases, it takes only a few days to adjust to a new pair of glasses. When you are adjusting to your new glasses, you might experience some symptoms such as mild dizziness, blurry vision, or eye strain. This would be a normal situation. These symptoms are common with new glasses and typically last only a few days.

Even though the new glasses come with the same prescription, different frames or lenses can alter your vision until you get used to the new frame style, frame material or lens type.

Besides, other factors will affect the adjustment time, such as the complexity of your prescription, the type of lens, and so on.

How long does it take to adjust to new glasses? It usually takes a few days. However, if you experience eye strain, distorted vision, and especially headaches for a few weeks, you had better contact the eye doctor or the optician. They will check your eyeglass and the prescription.

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