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Frequently Asked Questions
- Are varifocal glasses a new type of glasses?
- What are varifocal lenses?
- Who would wear them and why?
- Can varifocal lenses fit into any size frame?
- Can I buy varifocal lenses from the internet?
- Can I measure my own eyes for my PD measurements so I can buy online?
- Can I get varifocal sunglasses?
- Can I get Light Reactive varifocal lenses?
1.Are varifocal glasses a new type of glasses?
No. In 1959 the very first varifocal glasses called Varilux were invented. Over the years they have progressed and massively improved in design. Now, one of the most popular types of lenses sold world wide, being so comfortable and practical for the wearer, they have proved to be the ideal choice of everyday eyewear for millions of people.
Varifocal glasses are lenses that contain 3 different prescription powers. They contain prescriptions to correct vision in the far distance, mid distance (about an arms length away) and the near distance.
There are lots of different brands and types of varifocal lenses available on the market, some of them much better than others in performance. As shown on the image below, the very basic lenses have a much narrower field of vision at all distances.
The better quality lenses as shown on the next image below have a much wider field of vision at all distances. Generally speaking, the better quality lenses are by far the best option as they are much more comfortable to wear, and give a clearer, wider field of vision at all distances for the wearer.
When wearing varifocal lenses for the first time, advice from an expert in the optical industry is always preferable to trying to choose which lenses are best yourself. Some shops offer very cheap or even free varifocal lenses when you buy frames from them. This isn’t always the better option, as mentioned above, budget varifocal lenses have often been found to give a much narrower field of vision than the better quality lenses, making them impractical and uncomfortable to wear. Often, these low quality lenses end up just sitting in a drawer unworn.
3.Who would wear them, and why?
It might be someone who has been wearing distance glasses for some time and is now approaching middle age. Or someone who has never worn glasses previously, but when approaching middle age finds they have difficulty focusing on anything up close.
Generally people around the age of 45 or over, develope an eye condition called Presbyopia. This isn’t some dreadful eye disease, it simply means that as the Crystalline lenses in their eyes becomes more rigid with age, and most people find it difficult to focus on close objects. This natural process of decreased flexibility in the eyes is called “ Presbyopia”
When Presbyopia first occurs, symptoms are holding text further away when reading, difficulties seeing small writing, and problems when trying to thread a needle. In order to see clearly at close distances again, a positive reading addition (seen as Add or Near on a prescription) is prescribed on top of the normal distance prescription. This means a different power lens is used for distance compared to reading. In terms of spectacles, if the wearer needs a prescription for both distances, they will need either two separate pairs of glasses, one for distance and one for reading/near), or varifocals which combine both prescriptions together.
As time goes on, the Crystalline lenses become more rigid, therefore the reading add (Add or Near on the prescription) has to be increased to compensate. By the age of 55-60 the lenses have lost all flexibility, and glasses are necessary for just about everyone to see up close.
4.Can varifocal lenses fit into any size frame?
The size of the frame is very important when considering buying varifocal lenses. Very shallow frames limit the quality of vision as the areas of the lenses are too small to fit the different prescriptions into. This results in the area of lens that contains the distance or reading prescriptions not being big enough to look through, limiting the size of the field of clear vision.
Ideally, a frame needs to be approximately 30mm deep to fit in most types of varifocal lenses. The pupils need to sit half way across the frame from left to right to avoid experiencing large amounts of distortion around the edges of the lenses. For example: If the pupils sit a lot nearer to the nose than the temple side of the lenses, the chance of peripheral distortion is greatly increased.
Smaller, shallow frames are very popular just now. There are varifocal lenses available which are specially designed to fit into shallow frames. These short lenses are fine for normal everyday use, but can become a problem for anyone who needs to focus on anything at arms length for long periods of time. A perfect example would be using a computer, or reading sheet music. To make varifocal lenses fit shallow frames, the middle section of the lenses has to be compromised. This results in the area available to see through clearly for mid distance being very small, and unpractical to use. These types of lenses are no good for computer use, or any other similar types of work.
5.Can I buy varifocal lenses from the internet?
Yes, but only if the online company has the exact eye measurements needed to make the lenses accurately. Caution is advisable if buying varifocal lenses online is an option you’d like to consider. There are some drawbacks and very positive aspects to buying online. The cost is normally greatly reduced compared to high street prices, but the exact eye measurements needed to make up the lenses can be a problem.
Firstly, use caution if buying online. Due to the technical complexities of varifocal lenses, be sure to speak to someone from the company to talk you through the whole process clearly. Make sure you feel comfortable to be able to ask for any advice that you need, that you are not being rushed, and have had any questions answered thoroughly, and in a manner that you completely understand. Never consider a company who is prepared to use average PD eye measurements, rather than making sure they have your own correct ones. Do they offer a no quibble guarantee, and what is their returns policy? Check out their reviews. Are the comments specific to the person who has actually bought glasses and is sending the review, and does it appear genuine? Just general comments about service etc are usually found on the reviews written by companies who specialise in supplying false reviews for other companies. (Yes this really does happen )
For further info about the pitfalls of buying online – read this.
6.Can I measure my own eyes for my PD measurements so I can buy online?
Here is a link to a video showing how to accurately measure your own PD eye measurements with the help of a friend. The way PD ‘s are measured on the video is fine for single vision lenses like distance or reading glasses. Just make sure that when you speak to someone about your lenses on the phone, you say if the glasses are for reading or distance vision. The PD measurement for reading lenses is slightly different to distance lenses, but can easily be worked out by the people glazing the lenses if a normal PD measurement is given as shown in the video. Just follow the instructions carefully and you will be fine to buy your lenses online. Buying varifocal lenses online is slightly different. Follow the instructions shown on the video, but you might be asked to then leave the dots on the lenses and send your frame complete with dots. This way the position of your pupils in the lenses can be double checked for accuracy. Be sure to speak to someone personally though, and follow the advice above regarding buying varifocal lenses online.
7.Can I get varifocal sunglasses?
Yes. Most brands and types of varifocal lenses can be tinted as sunglass lenses. Some of the thinner lenses can be difficult to tint, but there is usually an option available to you whatever your prescription. Tints vary from very light shades, to darker shades, and graduated tints which are normally a dark at the top of the lenses, graduating to a light shade, or completely clear at the bottom of the lenses.
8.Can I get light reactive varifocal lenses?
Yes. Also known as Transitions, Photochromic, Reactions, Reactolite. These lenses all react to the UV in the sun. The lenses will all be completely clear when indoors, and go dark when exposed to the UV from the sun when outdoors.
Varifocal light reactive lenses are very popular as most people find them very practical for everyday wear. Having just one pair of glasses is ideal as they are suitable to be worn on most occasions, taking away the need to carry more than one pair of glasses.
When these types of lenses are at their darkest, most brands will be fairly dark, suitable for most sunny weather conditions. Normal over the counter sunglasses, and prescription sunglasses will go a shade darker than light reactive lenses, if very darker lenses are preferable.
If sunglasses are needed for when doing a lot of driving, solid tint sunglasses would be a better option. This is because light reactive lenses won’t be as effective when driving as most modern cars windscreens have a UV filter built into them. This filter prevents the lenses from going very dark when worn in the car compared to when wearing them outside.
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In my years in the Optical industry I’ve seen literally scores of people who have had underlying health issues that were missed by their doctors but spotted by their opticians. I can’t stress enough how important it is to be seen on a regular basis by your optician.
Below is an article courtesy of the Daily Mail which outlines just how important it is that you should visit your optician on a regular basis.
Half of over-40s risk their health by failing to have eyesight tests despite knowing benefits of having regular checks
- One in seven people had driven without being able to see well enough
- More than five had not had a check for up to five years
- Eight per cent had never visited an optician for a routine check-up
Too many Britons are risking their sight and their lives by failing to have eye tests, experts warned last night.
They found that one in seven people over 40 had driven without being able to see well enough, endangering themselves and other road users.
Although most recognised the benefits of regular eye checks and knew opticians can also pick up potentially debilitating conditions such as diabetes, 53 per cent had not had a check for up to five years.
Tests: The research by Simplyhealth found eight per cent had never visited an optician for a routine check-up
Eight per cent had never visited an optician for a routine check-up. Forty per cent knew their vision was worse, but had done nothing, while 30 per cent just squinted if they struggled to read.
One in eight borrowed someone else’s glasses.
The survey of more than 1,000 people aged 40 to 75 was commissioned by the Simplyhealth Advisory Research Panel, set up to give independent information on key health issues.
Yet more than one in two (53 per cent) of respondents in the survey claimed they had not had an eye check for up to five years and eight per cent said they had never visited an optician for a routine eye check-up.
One in 10 thought failing vision was an inevitable part of ageing and they did not need an expert to tell them their sight was not as good as it once was.
However, one in eight said they were put off by worries about the cost of visiting an optician and having to buy glasses.
Dr Catherine Hood, from the panel, warned of a looming health crisis, adding: ‘Most people’s eyesight naturally worsens as they get older, known as age-related macular degeneration.
‘It’s worrying that 99 per cent failed to identify age-related macular degeneration as the most common cause of blindness. Only a third knew what the condition was. This has serious implications, as early diagnosis can slow loss of sight.’
Fellow panellist Francesca Marchetti said: ‘People are not getting their eyes checked enough, putting them at risk during activities such as driving. Regular checks can also pinpoint more serious conditions.’
Here’s the direct link to the article: http://goo.gl/IjnNYe
Transitions lenses (also known as Photochromic lens) are clear lenses that automatically adjust to changing light from the sun’s rays. As well as reducing eye fatigue, they help protect your eyes from glare and UV damage.
The lenses appear clear when indoors and at night, but go dark quickly when exposed to UV rays from the sun.
From this image below you’ll see that they look just like a normal pair of prescription glasses:
And with this image you’ll see what they look like when they are getting darker – the thing is – when you are wearing them, you’ll not notice them getting darker, you just see clearly as normal without the glare:
And from this next image you’ll see that they are almost as dark as a traditional pair of sunglasses and again while you are wearing them, you’ll not notice that they are going dark – you’ll just see as normal:
Transition lenses have UV protection built in, which protects the eyes from harmful UV rays, and helps reduce risk of harmful eye conditions such as Cataracts and Macular Degeneration.
When the transition lenses are at their very darkest outdoors, they will not be quite as dark as traditional very dark sunglasses, but will certainly be a big help if protection from glare is needed.
Anyone thinking of buying transitions lenses for driving, should be aware that the lenses do not go as dark in a car as when outside in the sun. This is because a car windscreen has a special UV filter built in, reducing the effect of the transitions lenses. For this reason anyone who drives for their occupation is better wearing prescription sunglasses for protection from the sun’s glare rather than transitions lenses.
Transitions lenses are very useful for many reasons:-
Reading on holidays
If someone who regularly wears reading glasses, also goes on holiday regularly, transitions are excellent for reading glasses as they can be used as reading sunglasses on a beach, or at home in a garden or conservatory.
If your work involves reading outdoors, a surveyor for example, reading outdoors in strong sunlight can be a problem. This is where transitions reading glasses, or transitions varifocal lenses are an excellent idea. The glasses can be worn indoors as usual, but will also be more comfortable to wear on sunny days when working outdoors.
Transitions lenses are very practical as they are good for all weather conditions. As well as being cost effective, they reduce the need to carry extra glasses around in case the weather turns. For this reason alone, many people opt to have transitions lenses rather than clear or permanently tinted lenses.
For further information on Photochromic or Transitions Lenses visit the following:Catherine Ibberson
I found this great article courtesy of the dailytelegraph.co.uk and it’s yet another article about how an optician can find out otherwhise unknown medical problems, serious ones. So, all in all, it’s definitely a good idea to have regular check ups at your opticians.
A routine eye test saved the life of a teenage girl after her optician found a tumour the size of an egg on Alice Walker’s retina was pressing against her brain.
By Alice Philipson and agencies
11:15AM BST 28 May 2013
Miss Walker, 19, was taken by her father to optician Phillip Bradley in Allestree, Derby for a regular check-up after battling nausea and severe headaches for months.
After specialists had studied her retina, the light-sensitive nerve layer at the back of her eye, they were stunned at their discovery.
The back of Miss Walker’s eye was completely swollen and the “wrong shape” and a potentially fatal brain tumour was spotted.
Within hours of her visit to the optician last October, Miss Walker, a student, was in the Royal Derby Hospital, where she was diagnosed with a rare type of tumour which had grown to the size of a small egg and had been pressing on her brain.
Miss Walker said: “I’d been feeling ill for about six months and had been to the doctors about four or five times.
“I had an eye test in April and everything was normal. But when my dad took me back in October, it was a very different story – we know something was wrong and I was told my retina was swollen.
“Instead of it being concave it was convex and my central vision had become poor.
“I was told that I would be referred. The next day, I was in hospital.”
In less than a week, Miss Walker was undergoing brain surgery, with consultants able to remove 98 per cent of the tumour, which proved not cancerous.
Her father Robert, 51, who runs a garden centre with wife Karen, 46, said: “It was a really worrying time for everyone.
“We were told that the tumour might be cancerous but it would need to be tested after it was removed.
“The position of the tumour meant it had been pressing on the tubes that drain fluid from the brain. Pressure had been building up and that’s why it had affected Alice’s retina and it can be fatal.”
The 19-year-old faced a gruelling four-hour operation to remove the tumour, which could have become life-threatening if it went untreated.
As soon as she arrived at the Royal Derby Hospital, Miss Walker was pumped with steroids to help bring down the dangerous inflammation.
Four days later, she travelled to Nottingham’s Queen’s Medical Centre, for intricate brain surgery.
Mr Walker said: “Alice was brave. The tumour was in the ventricle cavity and was attached to the brain.
“It was unclear just how much could be removed without upsetting anything.
“At the same time, we knew it was Alice’s only hope.
“Alice had been feeling quite unwell for the best part of last year.
“She’d had headaches and episodes of sickness. She was pale and tired and was generally just not herself.”
Miss Walker’s mother Karen, 46, stayed with her daughter in hospital while she had the operation.
She said: “We kept ringing the hospital to find out if she was out of the operating theatre. People die on the operating table – it happens.
“But finally, we got the news that she was in recovery and she was all right. We were told that the tumour had to be tested and we’d have to wait a week for the results. It was another anxious time.
“But when we heard that the tumour was not cancerous it was wonderful.
“After the op, we were told that 98 per cent of the tumour had been removed. Some of it had been attached to the brain and had been impossible to get out.
“The surgeon didn’t want to damage Alice’s brain and decided to leave it in there. There was a chance, we were told, that it might start to grow again.
“But it wasn’t cancer and it wasn’t a fast-growing thing.”
My thanks to the Daily Mail for routinely pointing out such cases whereby an optician spots a potentially very serious medical condition and highlighting it in their paper. You really should visit your optician on a regular basis, not only to get your vision checked but as you can see from this article below – your optician may spot something even more serious:
‘An optician saved my life’: Girl, 10, is diagnosed with a brain tumour after routine test flagged up a growth behind her eye
- Lauren Uncles went to the optician to get prescription sunglasses
- David Strachan, an optician at Specsavers in Burton upon Trent, noticed a swelling behind her optic nerve and suggested she get checked at hospital
- Tests at Queen’s Hospital revealed that Lauren had a benign brain tumour
- She was transferred to Birmingham Children’s Hospital for surgery
- Most of the tumour was removed but some remains meaning she may need further surgery
By Emma Innes
A ten-year-old schoolgirl had her life saved by a routine eye test which showed a tumour the size of a golf ball pressing against her brain.
Lauren Uncles went to her local opticians to get some prescription sunglasses for a family holiday in Cornwall on August 21.
But during her eye examination, optometrist David Strachan spotted swelling behind her optic nerve.
Lauren was rushed from her local Specsavers branch in Burton upon Trent, Staffordshire, to nearby Queen’s Hospital for further tests.
These revealed she had a rare cranial fibroma – a cancer which grows inside the eye – which can be deadly if left untreated and can cause complete blindness within days.
The next day she was taken to Birmingham Children’s Hospital where she underwent a major operation to remove the benign tumour.
Her mother Teresa, 34, a phone shop sales consultant, urged other parents to make sure their children get their eyes checked regularly.
She said: ‘I took her for an eye test because she was going to go to Cornwall on holiday with her friends.
‘The optometrist told us there was swelling on eye and told us it was best that we went to the hospital to get it checked out.
‘On the Thursday, the day she was set to go to Cornwall, we went to the hospital in the morning and were then taken to the children’s ward before she had an MRI.
‘Quite quickly after she had another one and I knew something was wrong. Then they told us the bad news.
‘I was heartbroken and in complete shock, you don’t expect news like that, no parent does, I thought it was all a bad dream but it wasn’t.
‘The doctors said the operation could not have gone better but there is still a tumour in her head, it has just been reduced in size.
‘I just want to appeal to all parents to make sure they take their children for an eye test.
‘What happened to Lauren shows that this can be the difference between life and death.’
Despite her life-saving operation, Lauren acted as if ‘nothing had happened’ and was back eating chips and ice cream within half hour.
Mother-of-three Teresa, from Barton-under-Needwood, Staffordshie, added: ‘We were all in tears, so worried about what was going to happen.
‘She could have gone blind at any moment, but Lauren turned to us and said: “You lot need to man up, it is me that’s got the problem, not you and the doctors will sort it out”.
‘She was amazing.
‘Lauren then had the two hour operation and within half an hour of waking up was eating chips, beans and ice cream, it was as if she was back to normal.
‘She was just a little tired.
‘Now I just think what could have been if I would have let her go on holiday, I don’t even like to think about it.
‘We went back to Specsavers after Lauren came out of hospital to thank Mr Strachan.
‘He had a tear in his eye, we all did, it was very emotional.
‘She basically thanked him for saving her life, he did a fantastic job.’
Lauren, who already wore glasses but didn’t have any symptoms before she went for her eye test, said: ‘I think everything went fine.
‘I was a little bit scared but it was okay, I was just telling everyone to man up, they were all crying but it wasn’t them having the operation.
‘It was good when I woke up because I had two dinners, I joked about having it but they actually gave it to me, it was great.
‘It was a bit strange going to sleep, but I am happy I am not in hospital anymore and I am happy that I am through the bad parts of everything now.’
Lauren’s mother, Teresa, has urged parents to get their children’s eyes tested regularly as ‘it can be the difference between life and death’. Image shows Specsavers in Burton upon Trent where Lauren was treated
Mr Strachan said he was not aware of anybody else as young as Lauren having a deadly brain tumour discovered by an eye test.
He said: ‘I’d never seen this in someone of such a young age before and without showing any real symptoms was really very unusual.
‘I’m just so glad to see Lauren making a fantastic recovery – it was wonderful to see Lauren so soon after her operation.
‘Her story is obviously quite unusual, but it does highlight how eye examinations can help identify a number of other health issues.
‘With children we recommend getting their eyes checked from the age of three, unless like Ms Uncles, you have any concerns in which case they should come in sooner.’
Read more: http://www.dailymail.co.uk/health/article-2408755/My-optician-saved-life-Girl-10-diagnosed-brain-tumour-routine-test-flagged-growth-eye.html#ixzz2ktePFezl
When I was working at a high street opticians I saw it time and time again that an optician spotted a potentially serious medical condition and here’s another example.
Girl, 9, saved by optician after doctors fail to spot plum-sized brain tumour SIX times
A nine-year-old girl whose brain tumour was missed by doctors six times was saved by opticians after her worried mother took her for an eye test.
Shanice Bailey could have been left paralysed by a rare plum-sized ‘schwannoma’ tumour growing out of a nerve and pressing on her brain stem.
She visited GPs six times between September 2009 and January this year complaining of headaches and sickness but was repeatedly diagnosed with asthma and sent away.
Only when Shanice developed a squint in her left eye did her mother Laura, 27, decide to take her for an eye test – where Specsavers optician Nadia Ahmed immediately spotted the growth.
Ms Ahmen told Ms Bailey to take her daughter straight to Queen Elizabeth Hospital in King’s Lynn, Norfolk, where a scan revealed the two inch tumour.
Eleven days later surgeons removed the tumour in a nine-hour operation.
Despite spending a month in hospital with side-effects Shanice is now at home recovering with her family.
Ms Bailey, from Wisbech, Cambs., said she would be forever grateful to the optician.
‘It’s so lucky we went to Specsavers when we did, otherwise the effects could have been devastating.
‘I kept taking Shanice back to the doctor as her symptoms got worse and more frequent.
‘Originally they said her symptoms could mean anything but then they thought it was asthma because she was coughing when she was sick.
‘She has been so brave it was unbelievable – she hasn’t cried once.
‘If they hadn’t have found the tumour she could have died because it was blocking fluid at the top of her spine.
‘I don’t necessarily blame the doctors but they should be given more training to check for problems in these areas. Just because it’s rare doesn’t mean they should ignore it.’
Laura took Shanice to the Clarkson Surgery in Wisbech over five months where she was seen three times by one GP and by a different doctor on every other occasion.
On their last visit, the doctor referred Shanice for an appointment with a paediatrician on January 20 to work out why her mystery symptoms were persisting.
But she had the eye appointment on January 3 where optician Ms Ahmen used a magnifying light that picked up swelling on the optic nerves.
The schwannoma tumour is usually only found in elderly women but the benign growth was coming out of Shanice’s hyoglossal nerve and blocking fluid at the top of her spine.
A week after her surgery the youngster also suffered from a vasospasm, where blood gets into the brain, and needed a second operation to drain cerebrospinal fluid.
Shanice said she felt great after her ordeal.
‘I feel so much better now. I can do things I couldn’t do before like my favourite street dancing classes,’ she said.
Trevor Lawson, a spokesman for Brain Tumour UK, said Shanice’s type of tumour was extremely rare in such a young child.
‘To my knowledge in the last five years no children were reported to have suffered that from type of tumour, which was responsible for only six per cent of all adult cases,’ he said.
‘The challenge for doctors is that brain tumours can present with common symptoms and we regularly support people who were diagnosed after an eye test.’
Paul Eagling, manager of Specsavers in Wisbech, said he was ‘extremely pleased’ they had been able to spot the growth.
‘Benign tumours can leave people with long term problems and we believe every brain tumour case should be given the same level of attention as cancer.
‘People tend to only go to the opticians when they have problems with their eyesight but regular visits to the optician are vital for checking general eye health.’
I’ve had a call from a lady in London this morning asking how much it would be for varifocal sunglass lenses put into her favourite Dior frame. I asked for her prescription so I could tell her an exact price.
To say she was very surprised, and extremely pleased with my quote of £105 is putting it very mildly.
She went on to explain that she’d been to 3 opticians shops in London who refused to reglaze her own frame, saying she’d have to buy a new one. The only shop prepared to supply new lenses only were asking for £299 for the lenses, and £70 for the actual reglaze service. £369 in total.
That’s a whopping £265 saving by using us and that includes postage as we offer a Freepost service.
I asked about the condition of her frame, thinking it might be in too poor a condition to reglaze. She told me the frame was bought at the airport last year, and hasn’t yet been used she it hasn’t got prescription lenses in. She’s been trying to get them glazed all summer, and had nothing but dirty looks and rudeness from people when she’s asked for lenses only.
If this is the attitude of some of the high street shops, no wonder they are struggling is all I can say.
How much does it cost to be polite and smile at someone?
A Freepost package is already in the post for her, and needless to say she’ll be coming to us again in future and I’ve a feeling so will her friends and family.Author: Catherine Ibberson
Why some online companies aren’t all they seem
We’ve had quite a few phone calls recently from people asking if we have received their glasses that they posted to us 2 weeks ago, or for an update regarding glasses they have sent in for glazing.
Why should I write a blog about this you might ask? The reason is that these people have sent their glasses to another company in error thinking they were us, or they have phones us in error.
I’ve no problem anyone phoning us, as we’ve actually been able to help even though we’ve been phoned in error. What I find unacceptable though, is that some online glazing companies feel it is acceptable practice to just ignore customers by not keeping them up to date with the progress of their order. I had two people in two days asking if their glasses had been received that had been posted TWO weeks previously.
Our practice is to phone our customers,
and begin processing their order on the day
we receive their glasses.Author: Catherine Ibberson
Why having a pair sunglasses is highly recommended, even if you have some transitions lenses already.
Lots of people who wear transitions lenses also have a pair of prescription sunglasses. Often the sunglasses would be just single vision distance lenses, so they can be worn for driving.
The reason for this is that transition lenses are not as effective when being worn in a car. The transition lenses react to the UV rays in the sun, so are excellent for walking outside, or reading in sunlight etc. However the car windscreen has a UV filter, which stops a lot of the UV rays from going through the windscreen. hence, the transition lenses don’t go as dark as they would if you were outside of the car.
This is where a pair of prescription sunglasses is very useful as they stay dark the whole time. The dark shade of sunglasses is often darker than transition lenses at their darkest as well, making them more effective when the sun is set particularly low in the sky. The winter sun is set lower on the horizon, making it dangerous as the glare can be dazzling for the driver at times. Dark sunglasses are far more effective than transition lenses on these occasions, and highly recommended.
Author: Catherine Ibberson