What Percentage of People Wear Glasses?

Roughly two out of three adults in high-income countries wear eyeglasses or some form of vision correction, though exact figures shift by country, age group, and how “wearing glasses” is defined. Globally, the picture is murkier: well over a billion people need corrective lenses but do not have them, which means the share of people who actually wear glasses is far lower than the share who should. The gap between those two numbers tells a bigger story than either one alone.

How Many People Actually Need Vision Correction

To understand how many people wear glasses, you first need to know how many people need them. A 2017 systematic review estimated that in 2015, about 217 million people worldwide had moderate or severe distance vision impairment, another 189 million had mild impairment, and roughly 1.1 billion people aged 35 and older had presbyopia, the age-related loss of near-focus ability that eventually hits almost everyone.¹ Add those together and you are looking at well over 1.5 billion people with some degree of impaired vision, in a world population of about 7.3 billion at the time. That is more than one in five people on the planet.

Most of these cases involve refractive errors: myopia (nearsightedness), hyperopia (farsightedness), astigmatism, or presbyopia. Refractive errors are by far the most common reason people end up in glasses, and they are correctable with relatively simple lenses. Yet more than a billion people who need glasses still do not have them, making uncorrected refractive error one of the leading causes of disability worldwide.²

The Numbers in Wealthy Countries Versus Everywhere Else

In the United States, United Kingdom, Australia, and similar high-income nations, survey data consistently finds that somewhere between 60% and 75% of adults use some kind of corrective eyewear, with glasses being the most popular choice by a wide margin over contact lenses. These numbers rise sharply with age: most people over 50 need reading glasses at minimum, simply because the lens inside the eye stiffens with time.

In lower-income settings the story is very different. The need for glasses is just as high, sometimes higher, but access to eye exams and affordable frames is far more limited. A systematic review of global assistive-product coverage found that unmet need for spectacles exceeded 60% in most settings studied.³ That means the majority of people who need glasses in those regions simply go without. The result is not just blurry vision. It translates into lost economic productivity estimated at over $400 billion globally each year when people with uncorrected vision cannot fully participate in the workforce.⁴

This disparity is worth keeping in mind when you see a headline claiming a specific percentage of people wear glasses. That number depends enormously on where you draw the boundary. A survey in the US will reflect high access; a survey in rural sub-Saharan Africa will reflect high need but low access. Neither tells the whole global story by itself.

Why Myopia Is Reshaping the Numbers

Nearsightedness has been climbing worldwide for decades, and the pace of the increase is striking enough that researchers call it a pandemic.⁵ In East and Southeast Asia, myopia prevalence among young adults now exceeds 80% in some urban populations. But the trend is not limited to Asia. An analysis of Israeli military conscripts born between 1971 and 1994 found that myopia prevalence rose from about 20% to 26% over a single generation.⁶ Similar upward trends show up in European, North American, and South American data.

What is driving this? The short answer is a combination of more time spent on close-up tasks and less time spent outdoors. A dose-response meta-analysis of 45 studies found that each additional hour of daily screen time was linked to roughly 21% higher odds of myopia, with the relationship becoming significant beyond one hour a day and nearly doubling the odds at four hours a day.⁷ Meanwhile, an overview of systematic reviews concluded that more time outdoors has a protective effect against developing myopia in the first place, though it does not seem to slow progression in people who are already nearsighted.⁸

The practical implication is straightforward: as screen time goes up and outdoor time goes down, particularly for children, more people end up needing glasses at younger ages. This is the single biggest factor pushing the percentage of glasses wearers higher year after year.

How Ethnicity and Geography Affect Prevalence

Genetics plays a real role in who develops refractive errors, and prevalence rates differ substantially between ethnic groups even when they live in the same city. A study of 10- and 11-year-old children in England found myopia rates of about 25% in South Asian children, 10% in Black African-Caribbean children, and just 3.4% in White European children.⁹ Those are large differences, and they hold up after adjusting for lifestyle factors. South Asian children in that study had roughly nine times the odds of being myopic compared to their White European classmates.

But genetics is not destiny. The rapid rise in myopia across all ethnic groups over a few decades cannot be explained by genetic changes alone; genes do not shift that fast across a population. What appears to be happening is that genetic predisposition interacts with environmental factors like education intensity, urbanization, and near-work habits. Populations with a high genetic susceptibility who also adopt intensive education systems and urban indoor lifestyles see the most dramatic increases.

Age Is the Strongest Predictor

If you want to know whether someone wears glasses, their age is the single best clue. Among children and teenagers, a meaningful minority need correction but the numbers are lower than in adults. A large British screening study of over 11,000 sixteen-year-olds found that about 18% had been prescribed glasses for current use, though a third of those did not actually have their glasses on hand at the examination.¹⁰ That study also found something that comes up repeatedly in vision research: girls were more likely than boys to have vision defects, and children from higher socioeconomic backgrounds had higher rates than those from lower-income families. The latter likely reflects greater access to eye exams and therefore more diagnosed problems, not fewer actual vision issues among poorer children.

By middle age, presbyopia becomes almost universal. The crystalline lens inside your eye gradually loses its flexibility starting around age 40, and by the late 40s or early 50s most people find they need reading glasses or bifocals even if they had perfect vision before. This is why the percentage of glasses wearers jumps so dramatically in older age groups. By age 65, it would be unusual not to need some form of corrective lens.

Having Glasses and Actually Wearing Them

Prescription rates and actual wearing rates are not the same thing, and the gap between them is surprisingly large, especially among children. A systematic review and meta-analysis of spectacle compliance in children with refractive errors found that overall compliance was only about 40%, with individual studies ranging from under 10% to nearly 80%.¹¹ That is a remarkable range. Some populations of children wear their glasses almost all the time; others barely touch them.

What drives the difference? Cosmetic concerns rank high among older children and teenagers. Social stigma around wearing glasses varies significantly by culture; in some East Asian settings, glasses are so common among students that there is relatively little stigma, while in other contexts children resist wearing them. Parental awareness matters too. A study of schoolchildren in Oman found that about 72% were still wearing their prescribed glasses at follow-up, with girls showing higher compliance than boys.¹² Adults tend to be more consistent, but even among adults, there are people walking around with outdated prescriptions or glasses sitting unused in a drawer. The British adolescent screening study noted that over a quarter of children prescribed glasses had normal or near-normal uncorrected acuity, suggesting they were prescribed cautiously or their vision had changed since the prescription, and these children were disproportionately likely to not wear their glasses.¹⁰

Affordability and Access Shape the Map

In the United States, whether you wear glasses correlates with how much money you make, not because wealthy people have worse eyes, but because they are more likely to get an eye exam and fill a prescription. An analysis of US national health survey data from 2008 to 2016 found that higher socioeconomic status was consistently associated with greater eye care use and fewer reported difficulties affording glasses. Having vision insurance made a significant difference as well.¹³

This creates a paradox in the data. Populations with better access to eye care show higher rates of glasses wearing, which can make it look as though wealth causes poor vision. The reality is the opposite: poor vision is distributed broadly, but detection and correction are not. In resource-limited settings, ready-made spectacles with standard prescriptions can address the majority of cases. One study in a low-resource population found that simple off-the-shelf reading glasses or bifocals met the needs of over 95% of people examined, with fewer than 5% requiring custom prescriptions for conditions like significant astigmatism.¹⁴ That is an encouraging finding: the technology to solve most of the global spectacle deficit already exists and is inexpensive. The problem is distribution.

Alternatives to Glasses

Not everyone who needs vision correction wears glasses. Contact lenses are used by an estimated 45 million people in the United States alone, and tens of millions more worldwide. Laser vision correction, particularly LASIK, has been performed on millions of patients since its introduction in the mid-1990s and remains the dominant surgical option for people wanting to eliminate dependence on glasses and contacts.¹⁵ These alternatives reduce the number of people who show up in surveys as glasses wearers, even though they still have underlying refractive errors. If the question is “what percentage of people have imperfect uncorrected vision,” the number is considerably higher than “what percentage wear glasses.”

LASIK and similar procedures are most effective for stable prescriptions in adults, and they carry their own set of tradeoffs including dry eyes and halos around lights at night. They also do nothing to prevent presbyopia, so many people who had laser surgery in their 30s end up buying reading glasses in their 50s anyway. Contact lenses, meanwhile, require ongoing maintenance and carry a small but real risk of eye infections. For the vast majority of people worldwide, glasses remain the simplest and most accessible form of correction.

Screens, Office Work, and Rising Demand

The shift toward desk-based, screen-heavy work has created a new category of vision complaints. Computer vision syndrome, characterized by eye strain, dry eyes, headaches, and blurred vision, affects a large proportion of people who spend long hours in front of monitors. A survey of university office workers found that about half wore glasses while using a computer, and most of those workers were logging more than four hours of screen time per day.¹⁶

Interestingly, wearing glasses does not necessarily protect against computer-related eye strain. A study of bank workers in Ethiopia found that those wearing glasses were about three times more likely to report computer vision syndrome compared to non-wearers.¹⁷ That does not mean glasses cause eye strain; more likely, people who already have vision issues and are more sensitive to screen work are the ones who end up wearing glasses. But it does highlight that having a pair of glasses is not a complete solution for screen-heavy lifestyles. Habits like taking regular breaks, using proper lighting, and wearing computer-specific lenses appear to reduce symptoms. One study of office secretaries found that using computer glasses with an anti-glare coating was associated with lower odds of eye strain symptoms.¹⁸

Astigmatism and Mixed Prescriptions

Myopia and hyperopia get most of the attention, but astigmatism is extremely common and often coexists with other refractive errors. Astigmatism occurs when the cornea or lens is curved unevenly, causing light to focus at multiple points instead of one. A study following schoolchildren over three years found that over half had at least mild astigmatism at age 11, and the prevalence climbed to over three-quarters by age 14.¹⁹ Astigmatism is also linked to the development of other refractive errors over time.²⁰

For glasses wearers, astigmatism means a more complex prescription, typically indicated by a “cylinder” value on your prescription slip. People with significant astigmatism cannot use simple off-the-shelf readers; they need custom-ground lenses. This is one reason why solving the global spectacles gap is not as simple as mass-distributing reading glasses, even though ready-made glasses cover the majority of cases in low-resource settings.

Where the Numbers Are Headed

Projections for the next few decades suggest the percentage of people needing glasses will climb substantially. A widely cited modeling study estimated that by 2050, about half the world’s population, roughly 5 billion people, will be myopic, with nearly 1 billion of those having high myopia severe enough to raise their risk of retinal detachment and other sight-threatening complications.²¹ That is roughly a fivefold increase in high myopia from 2000 levels. Even if access to glasses improves dramatically, the sheer volume of people needing correction will strain eye care systems worldwide.

The high myopia projection is particularly concerning because high myopia is not just a matter of thicker lenses. It physically stretches the eyeball, thinning the retina and increasing the lifetime risk of glaucoma, cataracts, and macular degeneration. For these individuals, glasses correct the blurriness but do not eliminate the structural risks that come with an elongated eye. Public health campaigns encouraging outdoor time for children and limiting early-childhood screen use are aimed squarely at bending this curve, but whether they can do so quickly enough to matter at a population level remains an open question.