John Lennon Sunglasses Polarized
Tue, Jun 14, 22 By : Koalaeye
Take the right size You will find that there are a variety of eyeglasses frames. Even if the eyeglasses look the same online, the effect of wearing them will be very different in different sizes. So if we want to choose glasses, we should try to do the measurement of the size, the width of the face, the distance between the eyes, and so on. We can calculate the size of the glasses to make sure the style fits your...

Take the right size

You will find that there are a variety of eyeglasses frames. Even if the eyeglasses look the same online, the effect of wearing them will be very different in different sizes. So if we want to choose glasses, we should try to do the measurement of the size, the width of the face, the distance between the eyes, and so on. We can calculate the size of the glasses to make sure the style fits your needs.


How many degrees of myopia do I need to wear glasses?

Students are the most nearsighted because they need to read and study every day. Many people have myopia during their student days. During the physical examination, everyone will check their eyesight first. Generally speaking, if the visual acuity is lower than 0.6, it means that you may be near-sighted to 0 degrees. At this time, you need to go for optometry to see the specific vision situation and see if you need to wear glasses. If the visual acuity tested exceeds 200 degrees, you must wear glasses at this time. If you do not wear glasses, your vision will be greatly affected, and the degree of myopia will rise quickly. For this reason, you must wear glasses in time to correct your vision. If the degree of myopia does not exceed 0 degrees, this is pseudo-myopia and does not require glasses. However, you should always take care to protect your eyes, avoid staring at things at close range for a long time, and don't let your eyes get too tired, so your vision will slowly return to normal.



Sunglasses

Sunglasses have a visible light transmittance of about 20% and can absorb ultraviolet and infrared rays well. It also has a variety of colors such as light green, light gray, light brown, etc., used to protect in different occasions. Among them, light gray lenses have little effect on color recognition. Light brown glasses make the blue sky look darker and reduce the transmission of green light. Light green lenses reduce the transmission of red light.

Sunglasses not only have a wide range of varieties, but with the improvement of decoration and health care effects, their scope of use has become more extensive. As the time to update sunglasses can be rapid, fashionable men and women would love to have multiple sunglasses to match clothes to satisfy their pursuit of fashion.


Do kids need blue light blocking glasses?

1. American Ophthalmological Association

The American Ophthalmological Association clearly stated that it does not recommend any special glasses. The organization stated that there is no evidence that blue light from electronic devices can cause damage to the eyes. The discomfort that many people experience after watching electronic screens for a long time is due to symptoms such as dry eyes and even blurred vision caused by digital visual fatigue. The symptoms of using electronic products are related to how we use digital devices, not the blue light emitted from digital devices. There is currently no clinical evidence that blue light causes damage to the eyes, and measures to prevent blue light may be more harmful than blue light itself. It is too early to take preventive measures against blue light and may have unintended consequences.

2. British Association of Optometrists

The association believes that there is a lack of high-quality evidence to support the use of blue shaded glasses to improve people's visual performance, sleep quality, relieve eye fatigue, or protect macular health. There is no research on the effect of anti-blue eyeglass lenses on the health of the macula.

3. Chinese Journal of Ophthalmology

If the blue light is excessive, that is, the human eye is exposed to high-frequency and high-energy blue light, it will damage the rod cells. However, the rich blue environment with intensive exposure and the normalized environment are two different concepts. Therefore, it is unscientific to equate blue light with retinal damage. Individualized blue light protection guidance and recommendations should be put forward under different conditions such as different ages, health conditions, and working environments.



Can the TR90 frame be changed?

TR90 material was originally made in Italy. It is difficult to color the frame, and usually, the color is painted on the outside. It can float in saltwater. It is suggested that the lens should be a water first to prevent overheating of the lens. Then, at the end of the nose, hinge, or the temple, carefully fold it in until it is comfortable to wear. You can use a household hair dryer to blow heat first, which can play the role of softening. Note that the hairdryer should be moved when heating, and do not aim at only one place. TR-90 is the most popular ultra-light material in the world at present.


VisionKids HappiMegane Anti Blue Light Glasses for Kids

With stylish design, they can effectively block blue, ultraviolet, and other harmful lights, relieve eye fatigue and can maintain natural high-definition visibility. They are safe to wear, with a durable frame, good recycling ability, durable, not afraid of breaking. They are wear-resistant, anti-skid, ergonomically designed to reduce ear pressure. The arc-shaped design fits highly with the root of the ear, effectively anti-skid.



Glasses are tools to protect your eyes.

Wearing glasses can relieve eye strain. Myopia without glasses will inevitably lead to eyes easy fatigue, so the result can only be a deepening of the degree. After wearing glasses normally, the phenomenon of visual fatigue will be greatly reduced. For young people, because the eyeball is still in the development period, regulatory myopia easily develops into axial myopia. Especially for high myopia, the diameter of the eyeball before and after is significantly prolonged. If the myopia is rectified by wearing a normal lens from the beginning, this situation will be reduced or even not occur. If people with Myopic did not wear lenses in time, it will cause ametropic amblyopia. So if wear appropriate glasses, after a longer treatment, most eyesight will be gradually improved.

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