When you first got your new glasses and they felt so thick and heavy on your little face? That’s what can happen if your glasses have ordinary plastic lenses. People with very strong prescriptions are not the best candidates for these lenses as they may end up being thicker than we would like. But don't worry! (more on that in a bit — yes, there are new types of lenses that can reduce your glasses to a sliver!) The most popular kind of these lenses gets the name high index 1.67 and high index 1.74 lenses. Here’s a closer look at what these lenses are and what more distinguishes them.
High index lenses are made of special materials that can bend light more effectively than ordinary plastic lenses. This critical feature even enables them to be thinner and lighter while still allowing you to see. Numbers such as 1.67 and 1.74 describe the extent to which materials bend light when it passes through them. The higher the number, the thinner the lens can be. So if you go with 1.74 lens, it will be thinner and lighter compared to 1.67 lenses, which is a big advantage where people may need stronger lenses.
The impression that high index lenses make on the appearance of your glasses is one of its very best assets. If you have a strong prescription, regular plastic lenses can cause your glasses to be very thick and heavy. The edges of those lenses can often be seen by the person wearing the glasses, which isn't always the best looking thing. But with high index lenses, they can be made much thinner and that makes them look a lot better on your face. Thinner lenses are also more comfortable to wear, which matters, particularly if you keep glasses on all day.
Almost every lens we use daily has a high index lens option but like anything else, high index lenses have their downsides too. One of the biggest drawbacks is that they are usually more expensive than standard plastic lenses. If you’re on a budget, this may be a significant factor to consider. Thin lenses can also be a tiny bit distorted or blurry at the edges, high index lenses. This is especially true for lenses which are not manufactured correctly. Last, but not least, the higher the index number, like with those 1.74 lenses, the more brittle the material can be. That means that if you drop your glasses, the lenses can chip or crack more easily than a thicker lens.
Next, a little more detail on the difference between the 1.67 and the 1.74 lenses. The fundamental difference between these two lens types is their minimum thickness. Lenses of 1.67 can be made thinner than 1.74 lenses, enabling them to be lighter and less visible on your face. This can be particularly useful for those who want their glasses to fit as comfortably as possible. It’s also worth remembering, though, that 1.74 lenses tend to be pricier and are often more fragile than 1.67 lenses. Therefore, 1.74 lenses could be the best option for you if you have a very strong prescription and would like the thinnest lenses possible. But if your prescription isn’t quite as strong and you’d like to save some money without sacrificing much in lens quality, 1.67 lenses could be a good option.
There are several key factors to consider when deciding which lens is right for you. Your prescription, first and foremost, is crucial. If your prescription is particularly strong, high index lenses are likely the better option. But if your prescription isn’t too strong, ordinary plastic lenses may work just as well for you. Another factor to think about is how much use your glasses get. If you wear your glasses often and want to look your best, you may want to pay extra for high index lenses. But if your glasses aren’t something you wear every day, you may be able to spend less on your lenses.
With PHOTON lenses, you can go with high index 1.67 lenses, or even high index 1.74 — the choice is entirely yours! And it’s always a smart move to consult your eye doctor about what lens type is best for you and your lifestyle. They can help guide you to your best options based on your prescription and lifestyle.
Photon Optical, A Chinese expert in optical lenses. Products include Single Vision Lens;Bifocal Lens;Blue cut Lens;Progressive Lens;Photochromic Lens, etc.
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