Do red lenses block blue light? | KOALAEYE OPTICAL

Do red lenses block blue light?

How to buy prescription glasses online?

To buy prescription glasses online, you should get a prescription and visit your local optician for an eye test. This test can be used not only to provide a prescription but also as a regular health check. Ask the optometrist for this data if you have had an eye exam and the optometrist provides a prescription. If you have an extra pair of glasses, send them to an online eyewear retailer to make sure the lenses have the correct 'visual center.' Measure the pupil distance. Ask your optometrist for this number, or get it from old glasses. Choose the right frame style to suit your face shape. Understand the frame measurements. Choose a suitable lens and its different lens film layer. Then place an order for glasses.


How to choose rectangular glasses?

Look at the facial features in the aspect of proportion. If your features are delicate, which makes you look petite, you can choose some wider glasses so that you will increase your mental outlook, making your features prominent. On the other hand, if your features look solid and take up a large space of your face, go for narrower frames, because wider frames will make you look tired and add weight to your head.



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.


Progressive lenses and single vision lenses

An optical lens that has only one luminosity on a single vision lens and does not have special functions.

The curvature of the front surface of the progressive lens increases continuously from top to bottom, and the refractive power increases gradually and continuously from the distance zone located on the upper part of the lens until the near zone at the bottom of the lens reaches the required near-use refractive power. A pair of glasses can be used. You can see far away, you can see close, and you can see objects in the middle distance.



Buy Glasses For Kids - Appropriate Frame Material

Metal and other materials are heavy, easy to rust, easy to deform, easy to lead to children's facial allergies, and oppression of the bridge of the nose and temple. Resin glasses are colorful, and the price of the material is beneficial. Because the child is in the development period, glasses are changed more frequently. Therefore, summarizing the above factors, the resin frame is the most suitable for children to wear. A high degree of myopia must choose a small frame. If the child's myopia or farsightedness is high, the lens will be very thick, so be sure to choose a small frame. Because the frame type is small, coupled with the lightweight of the resin frame, it has better fixing performance than other materials.


Thin frame glasses

Curved-rimmed glasses are very popular and common nowadays. It feels serious and intellectual. It is suitable for all face shapes. There are many colors to choose from. Fairies who especially like square frames can choose thin square glasses with gold wire. The border is not too obvious but it has edges.


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If you need reading glasses when using a computer, you may want to choose a lower reading glasses power. This is because most people view their screen from a greater distance from their eyes than when they are reading a book or a magazine.

However, if you need reading glasses for looking at something very close or very small, you may need a pair of stronger power glasses.

In most cases, when two reading glasses’ powers seem equally suitable, choose the glasses with the lower power. Picking reading glasses that are too string typically will cause more discomfort problems than reading glasses that are a little too weak.

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