Featured In The Sunday Times

What are High-Index Lenses: Why Do You Need Them?

What are High-Index Lenses: Why Do You Need Them?

Glasses with high lens index are currently the most favoured type of lens in the eyewear Industry. It is recognized for its lightweight, comfort and modernistic appeal as compared to the regular set of lenses. Glasses and lenses are prominent for vision correction and so are their design and the level of comfort and ease it renders. In the United Kingdom itself, 75% of the population wear corrective lenses to see better. Since eyeglasses are a customary and everyday fashion accessory that you carry to your workplace, gym, brunch with friends, etc., hence it needs to be handy. That’s why high-index lenses are getting the hype they deserve, it is everything you demand in a pair. Read on to find out more information and benefits of high-index lenses:

What are High Index Lenses?

In layman words, high-index lenses are proportionally thinner and lightweight than your usual lenses even after containing a higher prescription. It is a lens with higher properties of refraction i.e. the ability to bend the light and offer sight correction. Individuals with a refractive error such as nearsightedness, farsightedness or astigmatism have to wear strong prescription lenses as the vision keeps on deteriorating with time. Nearsightedness is one of the most common eye conditions hence most glasses are nearsighted. Being nearsighted, you are required to wear high-index glasses that are thin at the centre and thicker are the edge.

What are high index lenses

Eyesight prescription is measured by the unit called Dioptres(D). In case of nearsightedness, your lens prescription would be (-) minus, and it ranges from low -2.00 D to high -8.00 D. If you have an average or higher myopia in your eyes, you’ll need to wear lenses that are extremely thick like a brick on your eyes. Which feels heavy and you'll be confined with the weight of those lenses. If you have high nearsightedness, farsightedness or astigmatism, your lenses would be thick around the corners or at the centre which causes you to feel uneasy. The weight and discomfort make these glasses more like a medical tool attached to you rather than offering free and ease of use.

However, if you wear high-index lenses, your lenses are made thinner and lightweight with a higher prescription, unlike your average prescription glasses. It renders the vision correction, offers ease of use and comfort hence it is obviously a better choice

What is the Difference between High-index lenses and Standard lenses?

The dominant feature of high-index lenses from regular prescription lenses is the weight and thickness. These two lenses work the same and offer vision correction however they are different in size which is impressive towards convenience.

Difference between High-index lenses and Standard lenses

Weight: High-index lenses are with different types of plastic and glasses material that is denser in quality. Your standard lenses are made with plastic and glasses which are simpler and not denser as compared to high-index lenses. With increased density of the lenses, it is able to bend more light competently without needing more material. Therefore these are called “higher” indexes because the index refers to the ability of refracting light of material. Density makes these lenses achieve refraction without any additional material hence they are not heavy. It is lightweight which makes people switch.

The standard lenses require more material to be able to refract light for higher prescription hence more material is added. That ultimately makes the standard lenses much heavier to carry around in your eyes. The weight of the lenses generates an impact on the nose of the wearer who feels like carrying a stone on their face. People try to take them off whenever they don’t require them as the weight itself is simply unbearable for kids and adults.

Thickness: High-index lenses are much denser and don’t require any more addition of material. That makes these lenses extremely thinner which is favoured by the customers. The thickness of the lenses offers comfort, style and a lot of options with frames. Many a time, people couldn’t go rimless with high prescription because the thickness was too visible but with thin high-index lenses, it is a dream come true.

Standard lenses are thicker on the edges mostly which severely impact its appearance and prove to be prickly when going for frames. Not many frames can render its outer thick edges and it doesn’t fit. The thickness of these lenses are not appreciated as it does not allow fashion to exist and you are stuck with simple-looking singular frames for most of your lifetime.

How Do High-Index Lenses Operate?

To follow the working of high-index lenses, we need to understand how every lens works to develop a vision. Our eyes comprise three separate parts that help to focus the light rays on the cornea to produce an image. The light rays enter the retina, pass through the lens and pupil and reach the cornea to form the beautiful visual we typically perceive. The crystalline lens plays the most commanding part in projecting the light rays.

How do High-index lenses operate

However, many of us develop refractive error which gives us poor vision. It takes place due to disarrangement of the lenses in the eye where the lenses miss aligning the rays properly to construct an accurate image. Since the natural part of the eye fails to arrange the vision, we wear artificial lenses in our glasses to get our true vision back. These lenses help to treat the refractive errors by bending the light rays whenever it passes through the lens of the glasses. It is designed in a way that the light bends and reaches the cornea as it used to formerly.

Now you must inquire what is up with the different prescriptions. Well, your lens in the eye can disarrange in many alternative ways; it can be a low problem or high problem. If the lens is disarranged badly, you’ll need higher prescription glasses to bend more light. If the lens is bent lightly, then the lower prescription is needed. The lenses are made with plastic or glass and depending on the state of your lens, it is carved into a thicker or thinner shape.

High prescription eyes demand thick lenses as they require more level of light bending which further makes glasses bulky and heavy. With hefty lenses, the struggle of carrying them and comfort almost diminishes for the user. Heavy lenses get a very limited option in frames, and it doesn’t look great on the wearer. That’s where high-index glasses ace the demand in a single stroke. High-index glasses contain high-prescription to cure your refractive error but it is not heavy. It is lightweight and thinner which makes them handy and comfortable to wear. They bend the light perfectly to offer you the vision but efficiently with thinner and lightweight. It feels almost invisible to carry around.

What are the benefits of High-index lenses?

Big help with higher-prescription

If you have a refractive error and are suffering from nearsightedness, farsightedness or astigmatism, then don’t go for a heavy standard lens. High-index lenses are an enhanced solution for strong prescription eyes as the lenses are slim, lightweight and comfortable to wear around. With high-prescription, the eye problems are already enough hence if you find a remedy for your vision, it offers a better mode of accommodation.

Slim and Smooth.

There’s no denial of how high-index lenses are thin but help you with your high-prescription. The slimness of the lenses gives great bending of light to offer accurate visuals. The slimness of the lenses also allows experimenting with different frames of all types and styles.

Slim and Smooth

Looks Attractive

Standard lenses with thickness look bulky and heavy on your face while the high-index lenses are smooth and thin. The thinness of the lenses makes your glasses look attractive as there are no thicker edges to distract your look. It looks like a pretty plain type of lens that doesn’t tell your age off at first glance.

Works great on all age groups

From children to older adults, everyone wears corrective glasses all over the world. Heavy and thicker standard lenses might still be bearable but with kids and teenagers, it becomes exhausting. Though it is rare to see kids with prescriptions, it's still there. In fact, it has been reported that 69% of kids are born with 1.00D of astigmatism which with time can increase hence high-index glasses provide a convenient solution for every age group. So, if you are looking for thinnest glasses lenses for high prescription, look no more- high index lenses are there to the rescue.

Most Common Question about High-index Lenses

Are high index lenses worth it?

Yes! High index lenses are a modern solution toward bulky and heavy standard lenses. If you are struggling with high prescription and comfort then switch to high-index lenses for a better solution.

Why are high index lenses so expensive?

High index lenses are known for having the disadvantage of being too expensive. It is known for refracting higher amounts of light being thinner than standard lenses. However, it is expensive because it is made with different kinds of material. It is superior as compared to ordinary glasses and plastic therefore it costs more as it also offers extraordinary light-bending properties. Specscart offers high index lenses at an unbeatable price which is easily affordable for everyone so now you don’t have to worry about that.

What’s the major difference between 1.67 and 1.74 high-index lenses?

High index lenses come in different sizes and the most common ones are 1.67 and 1.74 lenses. 1.74 high-index lenses are thinner than 1.67 lenses offering the same features of high index lenses however 1.74 lenses are more expensive than 1.67 lenses. The 1.74 high-index lens is expensive because it has some additional features which 1.67 lenses don’t have like thinner and lighter weight and it's available in many colours.

At what prescription should you get high index lenses?

High-index lenses, as we all know, prove great for higher prescription as it is light and thin compared to standard lenses. If you have the refractive error of astigmatism, nearsightedness or farsightedness and have a higher prescription then your optometrist will advise you with high-index lenses. Go for an eye test with Specscart free eye test at home and at its optical stores to confirm your state of the vision and you'll be recommended with the right treatment.

How do I know if my lenses are high index?

There is no distinguishing factor or difference in design to know that you are wearing high index lenses. However, if you have a high-prescription from nearsightedness, astigmatism or farsightedness then you are most likely to be recommended from your optometrist.

Do high index lenses make eyes look smaller?

No! High index lenses, on the contrary, remove the visual distortion because of its slim and light design. Heavy prescription lenses make your eyes look smaller but with high-index lenses, your eyes appear bigger and clearer as the size of the lens is completely thin and lighter.

High index lenses make eyes look smaller

What is the most thin lens optimal for high prescriptions?

Out of all lenses, high-index lenses are known for being extraordinarily thin and lightweight for high-prescription. However high-index lenses also have various types of variation and in those, 1.74 lenses are known for being the ultimate thinnest and best looking lens of all. It is half the size of the plastic and five times thinner than high-index lenses making it the superior of them all. A beautiful blend of advanced technology and design.

Are high index lenses safe?

Yes! High-index lenses are completely safe and sound from use. They are safe for the skin and are made with high-quality material.

Do I really need high index lenses?

You’ll need high index lenses if you have a higher prescription from nearsightedness, farsightedness or astigmatism. These lenses offer incredible light bending features as compared to heavy or thick standard lenses. High-index lenses are thinner, lighter to use and prove extremely comfortable than heavy lenses.

Can I get high index lenses in any shape?

Yes! High index lenses are known for being incredibly thin and lightweight compared to the standard high prescription glasses. The best part of high-index glasses is that they can fit into any sort of frames and be available in all shapes. Since standard lenses of higher prescription have thicker edges which give them a limited option in frames as not all of them fit. But high-index lenses are compatible and it successfully lets you flaunt your fashionable choices.

When you order glasses online, make sure to check what index glasses you are getting.

Do high index lenses cause distortion?

High index lenses have a higher Abbe value than prescriptions made from standard plastic or glass, which means that there's a greater potential for distortion, particularly in your peripheral vision. Since high index lenses come with a higher Abbe value when compared to prescriptions crafted from glasses or standard plastic, chances are high that it might lead to distortion.

Can high index lenses be tinted?

Tinting your high index lenses can be a complicated process. Before sending your lenses for a tint coating, make sure to get in touch with the material supplier and learn whether the lenses can be tinted or not. There are certain high-index lenses that come with restrictions.

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