Are Photochromic Sunglasses Any Good?
Tue, Jun 14, 22 By : Koalaeye
Different Types of Progressive Lenses Premium progressive lenses are designed to provide a wider and smoother view. These lenses are highly customizable for your prescription, chosen frame and eye anatomy. Premium progressive lenses can incorporate your dominant eye into the design and make transitioning between different prescriptions feel smoother as well. However, due to these features, premium progressive lenses are more expensive than traditional lenses. Why is a prescription for glasses different from a prescription for contact lenses? The frame...

Different Types of Progressive Lenses

Premium progressive lenses are designed to provide a wider and smoother view. These lenses are highly customizable for your prescription, chosen frame and eye anatomy.

Premium progressive lenses can incorporate your dominant eye into the design and make transitioning between different prescriptions feel smoother as well. However, due to these features, premium progressive lenses are more expensive than traditional lenses.


Why is a prescription for glasses different from a prescription for contact lenses?

The frame glasses degrees are the optometric degrees of the eye, and the difference between the frame glasses degrees and the contact lens degrees is mainly due to the different contact distances between the two lenses and the eye. Usually, degrees of contact lenses and glasses need to be converted by a professional through vertex diopter. The conversion formula is Fc=Fs/(1-d×Fs). In the formula, Fc is the diopter of contact lens, Fs is the diopter of glasses frame lens, and D is the distance between frame glasses lens and cornea. Assuming that the prescription of frame glasses is -4.00d and the distance between lens apex is 12mm, the prescription of contact lenses is -4.00/ [1-0.012×(-4.00)] = -3.82d.



What are the components of a pair of glasses?

Nowadays, there are more and more people with myopia, and in order to see things better, many people with myopia will choose to wear glasses. People who wear glasses often have a great influence on the shape of their eyes, so don't wear glasses when you can. And a lot of accessories are needed to make a pair of glasses because the composition of eyeglasses is also very complicated. So what are the accessories for the glasses?

There are three main categories of main parts, accessories, and auxiliary materials. The main parts are frames, temples, lenses, and temple tips. Accessories include hinges, screws, nose pads, ornaments, etc. auxiliary materials include a tag, glass cloth, packing bag, PP and PE, glass case.


Understand blue light correctly.

Blue light has been shown to affect the body's circadian rhythms, with too much exposure to it late at night from gadgets such as mobile phones disrupting a person's ability to fall asleep. Therefore, it is recommended that people limit screen time two to three hours before bedtime and set their devices to night mode to reduce glare, relieve eye fatigue and minimize blue light at night. However, as we learn more about blue light, not all of it is bad for us. Blue light has been found to play an important role in maintaining health, such as regulating the secretion of hormones in living organisms. Blue light helps prevent reduced night vision and has been shown to benefit refractive development in adolescents and minors.



Single Vision vs Progressive: What Are Their Differences

In this part, we will show you some differences between single vision and progressive lenses. They differ in several factors, so here we will compare them one by one.

Progressive lenses generally have their reading zones just in the lower half of the lenses, while single vision glasses have the reading power all over the lens. So if you are working on something above your head and you need to see some small details, the progressive lenses will not work. And you can not see through the reading zone in progressive you need to switch to single vision reading glasses.

Single vision glasses are cheap than progressive lenses. Compared to progressive glasses, single vision glasses hold way fewer distortions in the periphery. So, there is no need to customize the lens design to the max. In addition, single vision glasses are often available in the optical store while the progressive often needs to be produced for you. In other words, the delivery time of single vision lenses will be shorter for you.

You can use your progressive glasses optimally just in an upright posture. As soon as you lay down on your couch, this will lead to blurry vision. The reason is your changed position which forces you to look lower through the lenses on the screen. However, with single vision glasses, you can change to an upright position and it would not be a problem anymore. You can position yourself on your couch as comfortably as you want and you can still see clearly with your single vision distance glasses.


How to Find Reading Glasses Strengths?

With the increase of age, your vision may begin to decrease and this is an inevitable change in your life. So, when you are trying to decipher some smaller prints, you may need the reading glasses.

When your vision begins to decrease, do not worry, this is a normal change. You will find that the deterioration insight often occurs around the age of 40. The technical term for this condition is called presbyopia, a natural, age-related change in the lens of the eye which makes it more difficult to focus on smaller print and close-up objects.

The condition may become worse as you are near 60 years of age, depending on the type of near distance tasks you performing. Of course, you also need to consider the actual situations.



Pure Titanium Glasses Frame Brand - Seiko

Seiko glasses, I believe, everyone has heard of this brand because Seiko glasses in the glasses industry are still relatively famous.Seiko is founded in 1881. It is one of the top ten pure titanium eyeglass brands in the world and enjoys a high reputation.So far, brand products have been involved in watches, optics, and other fields, and have done very wonderfully in different fields.Compared with similar products, its pure titanium spectacle frame is not only better than quality, but more in detail. Seiko's frame is divided into two categories: men and women.

There are business and professional styles.The two categories are divided into the full-frame and half-frame glasses frame. It can be seen that, in the style, Seiko glasses have a more clear, very specific positioning.For the common white-collar or company executives, the Seiko glasses frame is the most popular.

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