This very alarming article appeared
last week:
Our children are rapidly losing their sight. What can
be done?
The sudden
rise of short-sightedness worldwide, particularly among kids, has experts
alarmed and rushing for answers before a myopia epidemic takes hold.
Richard
Godwin
The global
myopia rate tripled between 1990 and 2023. Why?
12:00 AM March
15, 2025
The Weekend
Australian Magazine
Every morning
– shortly after checking my phone and shortly before brushing my teeth – I pull
down my lower eyelids in turn and smush a contact lens on to each of my
eyeballs. I’m pretty good at this by now and can do it without a mirror. After
a heartbreaking diagnosis when I was 12 – and a genuinely tragic first pair of
glasses – my vision declined throughout my teenage years, finally stabilising
at -4.5 dioptres, which means that objects come into focus at 22.22cm (ie one
metre divided by 4.5) in front of my face.
My eyeballs
are the wrong shape. They grew into eggs instead of perfect spheres. My
increased axial length – that’s the distance from my corneas in the front to my
retinas at the back – means that objects come into focus in the wrong place.
Without contacts or glasses, everything is underwater.
Like most of
my fellow myopes (shortsighted people), I have come to view this as a mild
hindrance but a manageable one. It hadn’t occurred to me until I began speaking
to the world’s leading myopia experts that I suffer from a disease. Least of
all a preventable disease. Least of all a disease that if left to spread at
its current rate will result in millions of people going blind.
It sounds
alarmist and yet when you look at the numbers, alarm feels appropriate.
Necessary, even. The global myopia rate tripled between 1990 and 2023,
according to a recent study in the British Journal of Ophthalmology. The
World Health Organisation predicts that by 2050, half of the world will need
glasses and 10 per cent will be high myopic (a -6 dioptre prescription or
higher), which carries severe risks of complications and even blindness.
“Myopia
should absolutely be viewed less as an inconvenience and should take its proper
place as a disease,” says Dr Donald Mutti, professor in optometry at Ohio State
University.
“Not all
myopic eyes have the pathologies that threaten vision,” he explains. “But it’s absolutely
the case that myopia increases risk for ocular disease.”
Ocular
diseases include cataracts, glaucoma, and the two that cause the experts most
concern. One is retinal detachment, which is when vitreous fluid – the jelly
inside your eyeballs – begins to leak and pushes the retina away at the back,
“a bit like a bubble in wallpaper” as a leaflet from Moorfields Eye Hospital in
London helpfully puts it. Moorfields has been handing out a lot of such
leaflets recently. Amid a “substantial” increase in retinal detachment
surgery, the hospital recently reported a sharp increase in the proportion of
myopes undergoing the treatment, with the steepest rise among younger patients.
“If your
retina detaches, you lose vision,” explains Dr Annegret Dahlmann-Noor, the
ophthalmologist who led the Moorfields study. “It starts in the periphery and
moves towards the centre and if it gets to the point where it affects your
central vision, then usually recovery is not complete. We’ve seen teenagers and
people in their early twenties present with retinal detachments. It’s a trend
we can see.”
The other
condition that “really destroys” your vision, as she puts it, is macular
degeneration. This is now the leading cause of blindness in working age people
in China, explains Dr Jan Roelof Polling, who is part of the myopia working
group at the Erasmus University Medical Centre in Rotterdam. “As your eyeballs
grow longer, it puts the tissues under strain,” he says. “The stretching is OK
when you’re young. But when you’re older you lose collagen – and there’s lots
of collagen in the eye. So now the eye is stretched but it has holes in it.”
Again, this
is a condition that once mainly affected older people but is now hitting
ever-younger patients. Unlike retinal detachment, there’s not a lot that can be
done about it. “You can have injections into the eyeball to take the bleed away
but that’s about it,” says Polling. “One third of all high myopes develop
myopic macular degeneration, which almost always results in visual impairment
or blindness.”
One third of
all “high myopes” … if you scale that up you begin to see the cause for alarm.
The world population is expected to be 10 billion by 2050. One-tenth of that is
one billion; one-third of that is 333 million. That’s a USA of blindness.
“That’s why
we’re starting to worry now,” says Polling. “You only have to look at China,
where 80-90 per cent of people have myopia and a significant proportion become
blind or visually impaired within their working careers. It’s a huge worry and
a huge expense for families. This will become a much bigger problem.”
At this
point, you’re probably wondering why. Why has the world’s eyesight
deteriorated so badly? The current estimate is that 15-20 per cent of British
teenagers are myopic, but our data gathering isn’t nearly as good as it is in
East Asia and Singapore, where this is already recognised as a dire catastrophe.
In Singapore, the “myopia capital of the world”, around 80 per cent of adults
are myopic. In Seoul, South Korea, the condition affects 96.5 per cent of
19-year-old males.
This is where
we are heading, stresses Dahlmann-Noor. “We analysed hundreds of data sets last
year. We used to have a rigid algorithm to find out what the underlying problem
was when a five-year-old already had myopia. We would do our diagnostic tests
and we would reliably be able to find something wrong – genetically,
metabolically, whatever.
“Now? If we
do the same tests as before, we find children with myopia who don’t have a
thing wrong with them. They only have myopia. So there is a trend for the onset
of myopia to be earlier. And there is a trend for children with simple myopia
coming into our NHS [National Health Service] clinics at an earlier age.”
There is a
strong genetic component to myopia. If both of your parents need glasses, you
probably will too; rates of myopia are also higher in certain Asian and
Afro-Caribbean populations than in white people. Still, none of this explains
the rapid increase in recent years. It isn’t the gene pool that has changed,
says Dahlmann-Noor: “What has changed very dramatically are our lifestyles.”
There are two
factors of particular concern. One is that children are not spending nearly as
much time in daylight as they need to. Daylight is thought to stimulate the
release of dopamine in the retina, which inhibits eyeball growth. Given that we
evolved as an outdoor species but now spend around 90 per cent of our lives
indoors, the idea that our eyes are struggling to cope with our low-light
interiors isn’t so surprising. The other factor is that children are spending
too long engaged in “near-work”, i.e. concentrating on things too close to
their face and thus squeezing their eyeballs into the wrong shape from an early
age.
Since myopia
develops while the eyeball is still growing, the crucial window is in
childhood. Hence the standard advice for children is known as the 20/20/2 rule:
for every 20 minutes of near-work, spend 20 seconds focusing on something in
the distance; and most importantly, spend two hours outside each day. Also, go
and get your eyes tested.
So,
environment plays a crucial role. Much of the blame for the shockingly high
rates of myopia in East Asia (notably in urban areas) seems to come down to the
highly competitive education system. East Asian children start school earlier
in life, work longer days, receive far more homework, and spend very little
time outdoors. Similarly, in Singapore, children spend as little as half an
hour a day outside.
One of the
few East Asian countries to have seen a decline in myopia rates in recent years
is Taiwan, which in 2010 introduced a policy known as Tian-Tian 120, which
encourages schools to incorporate 120 minutes of time outdoors into their daily
schedules.
You would
think that “less homework, morebreaks” is a message that most
schoolchildren could get behind. But it’s not solely schoolwork that’s to blame
– children’s leisure time has shifted too. China also tops the global chart of
hours spent playing video games each week (12.4 hours on average, compared to
the UK’s 7.2). And one of the things that Polling has noticed from studying
Dutch teenagers is that it’s no longer principally the academic children who
need glasses – it’s everyone. “There has long been an association with
education and myopia,” he says. “It used to be that the kids with glasses were
the ones who went on to study at university – and the kids who played soccer
stayed without glasses. That’s changed with people born after 2000. Everyone is
on their phone now.”
Dahlmann-Noor
is reluctant to draw conclusions before the link between early eyeball
development and devices has been more rigorously researched. However, she does
stress that if children only had access to phones when they were 16 or 17, the
effects on their eyesight wouldn’t be nearly as bad. “That’s when the eyeball
has reached its final state. But I have families coming into the consultation
rooms who clip a smartphone on to their child’s pushchair and have Peppa Pig
running. Why does a one-year-old need to have Peppa Pig on a smartphone? But
these things have invaded everyone’s private space and we don’t even notice
them any more.”
We are by now
fairly used to the idea that phones have made a generation of teenagers
anxious, depressed, sleep-deprived, narcissistic, susceptible to terrible
influencers – and the rest. US social psychologist Jonathan Haidt lays out the
evidence in grim detail in his bestseller The Anxious Generation, and if
you’re on any parental WhatsApp groups you’ll be aware of his thesis: the wide
adoption of the smartphone since 2010 plus a gradual erosion of unstructured
outdoor play has prompted a teenage mental health catastrophe, resulting in
higher rates of suicide and self-harm, particularly among teenage girls.
Nonetheless, the idea that these same forces might literally be destroying our
children’s ability to see things clearly – might even eventually blind them –
is not one that I’ve seen discussed, even in the most tech-phobic parental
forums. And yet: one Danish study found double the risk of myopia in 16- to
17-year-olds who used electronic devices for more than six hours a day. Chinese
studies have correlated axial length with time spent on both computers and
phones and found that yes, there is a link.
It should
be stressed, however, that experts are cautious about pushing the thesis
too hard. Dahlmann-Noor points out that the myopia trend long predates
smartphones. Concentrating on anything close to your face can be bad for your
eyesight. Your child could be copying out The Book of Common Prayer, she could
be performing a mindful colouring exercise, she could be playing Tetris on a
Game Boy in 1992 or she could be doomscrolling TikTok. The eyeball would be
under the same strain.
Moreover,
it’s generally agreed that near-work is secondary to time outdoors as a
determining factor. “If you’re looking at school-age kids from six or seven or
so, we have not found that near-work has the influence that people often think
it does,” says Mutti. “It just doesn’t show up as that significant a factor in
cohort or longitudinal studies.”
Mutti has
been collecting data on behavioural patterns and myopia since 1989 and is
convinced that time outdoors is the significant factor. “It’s pretty clear
that kids are spending less time outdoors than they used to,” he says. “When I
was a kid, my mum would encourage us to get out of the house: ‘Come back when
it’s dinner time’. But indoors is just a lot more entertaining than it used to
be. And parents have more concerns about unsupervised kids running wild on the
streets.”
Many of these
are perfectly rational, I’d add. I’d love my children to play outside more. But
my immediate urban environment is designed for cars, not children. There are
few activities for children to safely do outdoors that don’t require parental
supervision and/or cash.
And it’s not
as if time spent on screens and time spent outdoors are unrelated. If my eldest
is playing football with his mates, he is, perforce, not playing Roblox. If my
youngest is watching Bluey while I get some work done, this is almost
certainly happening indoors. And it’s the youngest I should be most worried
about, says Mutti. Even as a “near-work sceptic”, he is extremely concerned
about the effect of screens on the very young. “To me, the preponderance of
evidence is not in favour of near-work being so important in school-age kids,”
he says. “But could near-work influence a young child’s eyes? A preschooler’s
eyes? That’s a valuable question to ask. In my research on refractive
development, there are strong effects of near-focusing on the development of
infants’ eyes – maybe into the toddler years.”
He
demonstrates this to his students with balloons. “The focusing muscles act as a
mechanical force, tensing force at the front of the eye. If you put a squeeze
around the balloon in the front, it elongates at the back. So it’s not hard to
see how near-focusing could change the shape of an infant’s eye. That makes me
very concerned about how toddlers are spending their time.”
And here is
an “absolute difference” brought on by technology. “You no longer have to be
able to read to be an intense near-worker as a toddler,” he says. “If you watch
small children, they love their iPads. They’re very adept at swiping and
scrolling and finding their next video even at age two. I’m concerned about the
intense use of electronic devices among toddlers.”
Polling adds
that just because it’s harder to find a direct link between myopia and screens,
it doesn’t mean it doesn’t exist. “It’s relatively straightforward to measure
light exposure or even simply how much time a child is outside. It’s much
harder to measure focal distance.”
But either
way, it hardly seems surprising that myopia rates rapidly accelerated during
the Covid-19 pandemic, during which children were both locked up indoors and
forced to look at screens. Neither I nor my 11-year-old have forgotten the
torture of his Year 1 Zoom lessons. Indeed, the pandemic period of 2020 to 2023
saw a “notable” increase in myopia rates. One recent Scottish study found a 42
per cent rise in the incidence of myopia. And a recent study in Hong Kong found
that myopia rates in six to eight-year-olds had doubled during the Covid-19
pandemic: 25 per cent of six-year-olds and 46 per cent of eight-year-olds were
myopic.
It’s worth
stressing again that the earlier myopia presents itself, the worse it will be.
“It’s difficult because you don’t see immediate effects,” says Polling. “You
need a lot of exposure from a very young age and then, at the age of eight,
you finally become myopic.” Some parents with mild myopia aren’t too concerned
if their child is diagnosed with a similar prescription, he says. But if you’re
-3D at eight you are basically certain to be -6D or above at 18. And macular
degeneration might arrive in your forties or fifties. “These windows are
precious and fleeting,” says Polling. “If we can delay the onset of myopia
until 12 instead of 10, that’s a huge difference.”
What’s
interesting – OK, what’s maddening – is that when you bring this sort of
thing up with parents, they will often treat screens as a symptom of myopia as
opposed to a cause. As in: “Oh yes, I’ve noticed that Rosa always holds the
phone up close to her face when she’s watching cartoons in bed.” Here is an
account from an online myopia community from a parent panicking about the
results of their three-year-old’s first eye examination: “He would watch TV up
close (but most kids seem to) and also watch the phone up close with his head
tilted to one eye …” It’s almost as if we accept it as inevitable. A bit of
genetic bad luck. As opposed to a situation we might actually do something
about.
The
difficulty for ophthalmologists comes with framing a condition that will be
perfectly manageable for most people and may not present any complications as a
matter of urgency until decades down the line. The costs involved in requiring
contact lenses might focus minds. As might the risks. A few years ago, I
contracted acute keratitis from dirty contact lenses. This is an infection of
the cornea that can lead to blindness – and honestly, the pain was unbelievable.
It was like having sandpaper and chilli alternately rubbed into my right eye
and the cure was almost as torturous. I had to apply eye drops every 30 minutes
for 48 hours. I have been scrupulous about contact lens hygiene ever since.
But that’s
the thing about eyes. You take them for granted until you don’t. “I speak to
people who have macular degeneration in their forties and fifties,” says
Dahlmann-Noor. “They are incredibly bitter. They say, ‘I just wish someone had
warned me that this was on the cards’.” It’s certainly enough to be a serious
long-term worry for the NHS.
Still,
Dahlmann-Noor expresses some optimism. “For all my life, there was nothing you
could do about the growth of the eyeball,” she says. “You’d go and have your
eyes measured, you’d get your new glasses, and that was it. But now myopia has
become such a problem that there has been a lot of research and there are finally
treatments.”
It is not
possible to stop or reverse the onset of myopia. But it is possible to slow it
down. Corrective glasses and contact lenses work by creating a second image
shell in front of the retina, which pulls the image forward and counteracts the
elongation of the eyeball. These have been shown to slow the progression of
myopia by 40-50 per cent.
Then there
are atropine eye drops, which are already widely prescribed in Asia (sometimes
to pre-myopic infants) and are likely to become available in the UK this year.
There are
factors that are beyond the control of medics. “These Big Tech companies need
to start taking care of kids’ health,” says Polling. “They need to make their
apps less addictive. And to warn parents not to give children phones before the
age of six, and keep them to a minimum after that.”
Given the
extreme indifference tech companies have so far displayed towards the welfare
of children, you’d have to say they are extremely unlikely to do that without
being legally obliged to do so. “Now, I’m sorry, that’s not very optimistic!”
he laughs.
“But there is
something children can do,” he stresses. “Just play outdoors.”
I suspect
that would do most of us adults some good too.
Here is the link:
https://www.theaustralian.com.au/weekend-australian-magazine/our-children-are-rapidly-losing-their-sight-what-can-be-done/news-story/83b93c845b07f3404f5fd775c7743070
We need to get these little mites out and in the broad daylight for a decent spell each day,
Just how that fits with school, music and so on I have no idea but they need to get out there somehow!
I suspect the harm is done after 15 or so but before then its all hands to the pumps of glasses by the time 15 rolls around!
David.