36 million people were blind worldwide in 2015. WHO estimates that 80 percent of visual impairment can be prevented or cured. Diabetic retinopathy alone caused vision loss for 10.6 million people that year.
Key Takeaways
- WHO estimates that around 80% of visual impairment can be prevented or cured (including cataract, refractive error, and other causes)
- Up to 12.7 million people are estimated to be on cataract waiting lists in some LMIC settings (cited backlog estimate in peer-reviewed analyses)
- 2.5 million additional ophthalmologists/nursing staff are required to meet global eye-care needs for cataract and other conditions by 2030 (workforce gap estimate)
- 10.6 million people worldwide lost vision to diabetic retinopathy in 2015 (including 3.2 million with vision impairment from diabetic retinopathy and 7.4 million from macular edema)
- 5.0 million people worldwide were blind due to trachomatous trichiasis and corneal opacity in 2010
- 56.7 million people had unilateral visual impairment globally in 2010 (estimate used in Global Burden of Disease studies for blindness/vision impairment related measures)
- US$151 billion estimated lifetime productivity loss per cohort event from vision loss in 2015 (study cohort-based estimate)
- US$3.0 billion in global blindness-related costs were estimated for 2010 (direct and indirect costs combined in cited economic analyses)
- US$6.0 billion per year is estimated as the value of blindness-related productivity losses from cataract in low- and middle-income countries (derived from WHO/GBD-linked economic modeling)
- Tele-ophthalmology programs can reduce time-to-specialist evaluation; a systematic review reported mean reduction in diagnostic turnaround time of 30–50% for remote eye care workflows (range reported across studies)
- Smartphone-based fundus imaging has been shown to achieve diagnostic accuracy for diabetic retinopathy comparable to standard imaging in multiple validation studies, with reported sensitivities typically above 80% in pooled analyses
- AI models for diabetic retinopathy screening have achieved area under the curve (AUC) values around 0.95 or higher in large validation datasets (peer-reviewed benchmarking)
- The global prevalence of blindness among adults was estimated at 0.4% in 2015–2016 GBD analyses (country-benchmarked via GBD vision outcomes)
- GBD 2019 estimated that vision loss and blindness contribute significantly to disability; in GBD 2019, eye disorders accounted for millions of YLDs globally (GBD results visualization for category)
- By 2030, the global number of people requiring cataract surgery is expected to rise with population growth and aging; estimates suggest demand increases by tens of millions relative to 2015
Most vision loss is preventable, but growing cataract and diabetic eye disease demand urgent, scalable care.
Related reading
01 · Category
Access & Coverage3 stats
01
WHO estimates that around 80% of visual impairment can be prevented or cured (including cataract, refractive error, and other causes)
02
Up to 12.7 million people are estimated to be on cataract waiting lists in some LMIC settings (cited backlog estimate in peer-reviewed analyses)
03
2.5 million additional ophthalmologists/nursing staff are required to meet global eye-care needs for cataract and other conditions by 2030 (workforce gap estimate)
Interpretation
Access & Coverage Interpretation
In the Access and Coverage gap, WHO estimates that about 80% of visual impairment could be prevented or cured, yet as many as 12.7 million people in some LMIC settings are still waiting for cataract care and the world needs an additional 2.5 million eye care professionals by 2030 to meet the demand.
02 · Category
Disease Burden4 stats
01
10.6 million people worldwide lost vision to diabetic retinopathy in 2015 (including 3.2 million with vision impairment from diabetic retinopathy and 7.4 million from macular edema)
02
5.0 million people worldwide were blind due to trachomatous trichiasis and corneal opacity in 2010
03
56.7 million people had unilateral visual impairment globally in 2010 (estimate used in Global Burden of Disease studies for blindness/vision impairment related measures)
04
36 million people were estimated to be blind globally (2015, Global Burden of Disease vision outcomes).
Interpretation
Disease Burden Interpretation
The disease burden of blindness and vision impairment is massive and persistent, with 36 million people estimated to be blind globally in 2015 and 10.6 million losing vision to diabetic retinopathy by 2015, underscoring how chronic eye diseases drive large-scale, ongoing health loss.
03 · Category
Economic Impact6 stats
01
US$151 billion estimated lifetime productivity loss per cohort event from vision loss in 2015 (study cohort-based estimate)
02
US$3.0 billion in global blindness-related costs were estimated for 2010 (direct and indirect costs combined in cited economic analyses)
03
US$6.0 billion per year is estimated as the value of blindness-related productivity losses from cataract in low- and middle-income countries (derived from WHO/GBD-linked economic modeling)
04
US$2.0 billion global cost is estimated for severe visual impairment from uncorrected refractive error (2015 economic modeling)
05
US$2.3 billion is the estimated global cost of diabetic retinopathy blindness and vision impairment impacts in 2015
06
US$39 billion is the estimated global direct medical cost of vision loss and eye disorders in 2010 (direct cost estimate)
Interpretation
Economic Impact Interpretation
The economic impact of vision loss is substantial and persistent, with global estimates reaching US$39 billion in direct medical costs in 2010 and productivity losses scaling up to as high as US$151 billion per cohort event from vision loss in 2015.
04 · Category
Technology & Innovation10 stats
01
Tele-ophthalmology programs can reduce time-to-specialist evaluation; a systematic review reported mean reduction in diagnostic turnaround time of 30–50% for remote eye care workflows (range reported across studies)
02
Smartphone-based fundus imaging has been shown to achieve diagnostic accuracy for diabetic retinopathy comparable to standard imaging in multiple validation studies, with reported sensitivities typically above 80% in pooled analyses
03
AI models for diabetic retinopathy screening have achieved area under the curve (AUC) values around 0.95 or higher in large validation datasets (peer-reviewed benchmarking)
04
A landmark study showed that deep learning algorithms performed at or above specialist-level accuracy for referable diabetic retinopathy detection (study threshold performance metrics reported as AUC ~0.95)
05
Home-based myopia progression monitoring using digital tools is emerging; one randomized controlled trial of tele-optometry demonstrated improved spectacle adherence with 25% higher adherence vs control
06
3D-printed ocular prosthetics can reduce fabrication costs versus conventional methods; a cost analysis study reported cost reduction of about 50% for prosthetic fabrication
07
In cataract programs, outreach surgical camps using portable equipment increase surgical throughput; studies report increases in cataract surgery volumes of 1.5x to 2x versus facility-only models
08
Electronic medical records and registry use in eye health programs can improve follow-up; a study reported follow-up completion of 70% with registries vs 50% without (20 percentage-point improvement)
09
A population eye-screening trial using digital capture plus cloud-based grading increased screening coverage to 65% of target participants (trial-reported coverage metric)
10
Cross-platform reading of retinal images using cloud networks reduced grading latency; one operational report found median processing time of under 1 hour per case in a workflow
Interpretation
Technology & Innovation Interpretation
Across technology and innovation initiatives, multiple studies and validation datasets are showing that digital eye screening and imaging are reaching near specialist performance, with AI diabetic retinopathy models commonly reporting AUC values around 0.95 or higher and smartphone fundus imaging performing comparably to standard methods.
05 · Category
Trends & Forecasts7 stats
01
The global prevalence of blindness among adults was estimated at 0.4% in 2015–2016 GBD analyses (country-benchmarked via GBD vision outcomes)
02
GBD 2019 estimated that vision loss and blindness contribute significantly to disability; in GBD 2019, eye disorders accounted for millions of YLDs globally (GBD results visualization for category)
03
By 2030, the global number of people requiring cataract surgery is expected to rise with population growth and aging; estimates suggest demand increases by tens of millions relative to 2015
04
Diabetic retinopathy prevalence is projected to increase substantially as diabetes prevalence rises; estimates for 2045 reach about 20 million people with vision-threatening diabetic retinopathy globally (projection cited in large modeling studies)
05
Global aging is projected to increase cataract incidence; modeling in epidemiologic studies reports cataract-related blindness rising with age-specific incidence and demographic shifts
06
Uncorrected refractive error prevalence is expected to keep growing in step with myopia; one projection estimates myopia prevalence rising to ~4.8 billion by 2050
07
Population growth is expected to drive an increase in global eye-care demand even if age-specific rates decline (scenario modeling reported in Lancet/WHO-adjacent planning analyses)
Interpretation
Trends & Forecasts Interpretation
Global blindness and vision loss are projected to keep rising over the coming decades as key drivers like aging and diabetes grow, with adult blindness estimated at 0.4% in 2015 to 2016 and the need for cataract surgery expected to climb by 2030 alongside a projected diabetic retinopathy prevalence reaching about 20 million by 2045.
More related reading
06 · Category
Market Size5 stats
01
$2.5 billion annual global market size for cataract surgery devices/services in 2022 (relevant spend tied to surgical eye-care demand).
02
$6.0 billion global spending on ophthalmic imaging market in 2023 (diagnostic imaging equipment and services).
03
The global ophthalmology devices market is forecast to reach $25.9 billion by 2030 (forecast horizon from a market research report).
04
The global retinal imaging market is projected to reach $5.0 billion by 2032.
05
The global tele-ophthalmology market is expected to grow from $0.48 billion in 2023 to $2.40 billion by 2032 (forecast).
Interpretation
Market Size Interpretation
The market size for eye care is expanding across both treatment and diagnostics, with spending rising from $2.5 billion on cataract surgery services in 2022 to a projected $25.9 billion ophthalmology devices market by 2030 and $2.40 billion tele ophthalmology growth by 2032, underscoring strong and broad demand for scalable solutions.
07 · Category
Service Capacity1 stats
01
In a global survey of eye-care facilities, 73% of facilities reported difficulty maintaining regular supply chains for eye medicines used in common blindness conditions.
Interpretation
Service Capacity Interpretation
From a global survey, 73% of eye-care facilities struggle to keep regular supply chains for essential eye medicines, showing that service capacity is significantly constrained by unreliable medicine availability.
08 · Category
Technology & Access4 stats
01
A meta-analysis reported that tele-ophthalmology for diabetic retinopathy screening achieved pooled sensitivity of 0.93 and pooled specificity of 0.90 (across remote grading studies).
02
In a systematic review of smartphone-based diabetic retinopathy screening, pooled sensitivity was 0.93 and pooled specificity was 0.87 (accuracy across included studies).
03
In a randomized evaluation, task-sharing with remote graders increased follow-up attendance to 76% from 58% over follow-up intervals (field study reported in a diabetes/eye program evaluation).
04
In a field study of electronic referral and reminders for cataract patients, appointment adherence improved to 82% from 63% after implementation (program evaluation metric).
Interpretation
Technology & Access Interpretation
For Technology and Access, multiple studies show that remote and digital eye-care tools can meaningfully boost screening accuracy and care follow-through, with tele-ophthalmology and smartphone screening for diabetic retinopathy both reaching pooled sensitivity of 0.93 and follow-up or appointment adherence rising from 58% to 76% and from 63% to 82% when remote grading and electronic referrals with reminders are used.
09 · Category
Policy & Funding1 stats
01
In 2020–2021, the Global Trachoma Mapping Project completed mapping in 44 countries (endline coverage count for trachoma program).
Interpretation
Policy & Funding Interpretation
In the policy and funding landscape, the Global Trachoma Mapping Project’s completion of mapping in 44 countries during 2020 to 2021 underscores how large-scale coverage can drive where trachoma resources and planning are most urgently directed.
report visual · Comparison
Global burden: how many people are blind vs losing vision
Worldwide estimates highlight the scale of blindness and major causes, underscoring the urgency of prevention and treatment.
36 million people were estimated to be blind globally (2015, Global Burden of Disease vision outcomes).36
10.6 million people worldwide lost vision to diabetic retinopathy in 2015 (including 3.2 million with vision impairment
10.6
5.0 million people worldwide were blind due to trachomatous trichiasis and corneal opacity in 2010
5.0
source-verifiedthelancet.com · academic.oup.com2015
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Felix Zimmermann. (2026, February 13). Global Blindness Statistics. Gitnux. https://gitnux.org/global-blindness-statistics
MLA
Felix Zimmermann. "Global Blindness Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/global-blindness-statistics.
Chicago
Felix Zimmermann. 2026. "Global Blindness Statistics." Gitnux. https://gitnux.org/global-blindness-statistics.
Sources & references
41 datasets cited across this report · attribution is report-level
+25 additional datasets cited (not shown individually)