What Is The Difference Between A Retinal Tear And A Retinal Detachment? | KOALAEYE OPTICAL

What Is The Difference Between A Retinal Tear And A Retinal Detachment?

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Warby Parker

WARBY PARKER, one of the most popular eyewear brands in the United States, set up its own experience store in New York City in 2014, where consumers can walk in and out and try them on. They founded a rebellious spirit and lofty goals: to create high-quality, classic production, and the pursuit of fashion and high-quality glasses. Warby Parker's overall design is minimal. They provide many services to help you choose the frame. Almost every frame has a try-on picture and full view and provides a virtual try-on service. Free trial at home, physical experience stores, online virtual tries, and unconditional returns within 30 days really make you feel free.


Points To Note When Choosing Frames

Choose a frame with lightweight, good elasticity, and stable structure. The lens frame with poor quality tends to deform in use, which affects the optical properties of the glasses. Pay attention to whether the two sides of the frame are symmetrical and whether it is fixed and safe enough. Pay attention to whether there are scratches on the surface of the frame. Just put on the glasses to feel if it is very tight or very loose, and they must be tight to reach the saturation condition. Pay attention to distinguish the advantages and disadvantages of the coating. The better coating frame has a uniform color, smooth surface, and clear identification. After using the frame with poor coating quality, the frame will soon rust and fall off, affecting the life of the frame, and even causing skin discomfort or allergy.



The shape of the lens is also important.

Aviator and cat-eye glasses should be avoided, as both will cut off the base of the prescription, resulting in poor reading vision. Instead, they should opt for shorter frames with rounded edges, such as bull horn frames, vintage wingtips, round frames, and oval frames.


The anti-reflection principle of the anti-reflection film

Anti-reflection Coating, known as anti-reflection membrane, is called anti-reflection coating in English, or AR membrane for short. The basis of anti-reflection is the wave and interference of light. The principle is: Two light waves with the same amplitude and the same wavelength are superimposed, then the light wave amplitude is enhanced. The two wavelengths and amplitudes are the same, but the superposition of wavelengths with different wave paths (similar to dislocation) cancels each other out. Therefore, the anti-reflection film plated on the surface of the lens uses this principle to make the reflected light generated by the front and rear surfaces of the film layer interfere with each other, thus canceling each other and achieving the effect of reducing reflection.



What are the features of TR90 glasses?

One of the best features of the TR-90 glasses is impact resistance. If you often drop glasses or accidentally sit on them, this material reduces the impact and the frames will quickly return to their original shape. They are flexible, and can easily show your face. Much lighter than other materials, the feather-light feeling makes them comfortable. Because the TR90 frame has high elasticity and is not easy to break, it has high strength and does not break. The material of TR90 is much more expensive than other PC, CP, and other materials, and the production process is strict, so the price of the TR90 frame is several times more expensive than other frame materials. Because TR90 material has strong wear resistance, chemical resistance, and solvent resistance, it is not easy to be burned. But TR90 material is the most widely used material in China at present, and its safety performance is the best one among all materials.


What is the progressive multifocal lens?

The lens of progressive multifocal glasses can change the refraction of the lens at the upper part of the central channel of the line of sight, which can effectively solve the difference of refraction when people view objects at different distances from long, medium, and short distances. Depending on demand, people have the flexibility to change or compensate vision according to visual distance, making it easier to help to adjust your vision in a variety of situations.


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Benefits of glasses

You don't need a special cleaning plan, and they don't require much care. You can choose from a variety of frames to suit your style. If your vision stays the same, you won't need to change your glasses as often. You don't need to touch your eyes to wear them, and in addition, glasses can adjust the amount of light entering your eyes for optimal comfort and vision. Glasses are more powerful modifiers than contact lenses. Glasses are not only used as a tool to correct vision but as accessories. On different occasions, the different dresses should match different frame glasses, reflecting the person's different temperament.

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