April 03, 2024

New report: Reading glasses boost income by a third in low-income communities

Wearing reading glasses helped people return to work; improved near-vision quality of life by 16%

A woman in Bangladesh helps a man with his new eyeglasses. Photo from Vision Spring.
Photo credit: VisionSpring

NEW YORK, NY – A pair of reading glasses increases the earnings of people in low-income communities by 33% according to new research.

A new randomized controlled trial published today finds that the provision of reading glasses improves livelihoods and quality of life and reduces poverty. 

Today VisionSpring, BRAC, and Queen’s University Belfast released the findings of their THRIVE study – Tradespeople and Hand-workers Rural Initiative for a Vision-enhanced Economy.

THRIVE was carried out across rural Bangladesh, and the findings are of particular importance because no other health-related intervention has reported an effect size as large for income.

The results uncover a number of benefits for first-time wearers of reading glasses across a wide variety of rural occupations:

  • Higher earnings: The monthly median income of an individual who received reading glasses increased from US$35.3 to US$47.1 within eight months, a difference of 33.4%, whereas the control group showed no increase.
  • Returning to work: Income increases were higher among those who were not working at the start of the study, suggesting that reading glasses helped economically inactive people return to work.
  • Not just for people who are literate: Reading glasses are not just for people who can read. Only 35% of participants in the study were literate. Reading glasses helped participants accomplish work and household tasks such as threading a needle, weaving, and sorting grain.
  • Quality of life: Wearers experienced a 16% improvement on a near vision quality of life index. The index measures factors such as people’s sense of independence and ease of doing daily tasks, such as reading a mobile phone display and seeing the food they are preparing and eating.
  • Widespread blurry vision: The trial found a substantial need for near glasses in this working population; 50% of those aged 35-65 years who had their eyes tested were identified to have presbyopia, the inability to see close up without help from glasses. This underscores the substantial potential for economic benefit with an inexpensive glasses intervention in this large and important group.

The THRIVE trial involved 824 people from 15 districts of Bangladesh. The study was carried out in communities significantly engaged in farming and artisan crafts and included participants such as teachers, tailors, shopkeepers, and mechanics. Participants were on average age 47 and 48% female. THRIVE’s focus on income builds upon the findings of the PROSPER trial VisionSpring undertook which was the first-ever randomized controlled trial to explore the link between clear vision and productivity.

Ella Gudwin, the CEO of VisionSpring, comments: “The THRIVE study reveals that the simple intervention of reading glasses yields outsized impact in terms of income. We encourage governments, philanthropists, development agencies and the private sector to invest in vision correction as livelihood interventions. This evidence-based investment will boost individuals’ earnings as well as generate increased economic output and productivity that is good for communities and the wider economy.”

More than a billion people globally don’t have the glasses they need to see clearly. Presbyopia is the leading cause of vision impairment globally. Without reading glasses more than 826 million people have difficulty performing routine tasks and maximizing their income earning potential.

A way forward for vision screening in low- and middle-income countries: task-sharing

In addition to measuring the impact of reading glasses on worker income, the study highlighted the opportunity to increase access to vision care by training non-medical personnel such as community health workers to conduct basic sight tests and dispense readymade reading glasses.

All the screenings in the trial were conducted by non-medical personnel, as opposed to optometrists. By demonstrating that reading glasses dispensed by community health workers significantly improved income, THRIVE affirms the efficacy of this approach to improve livelihoods in low-income settings.

Last year the World Health Organization introduced training for community health workers and primary care providers to identify presbyopia, dispense reading glasses, and refer for other eye conditions. This is the same task sharing methodology that VisionSpring and BRAC pioneered in 2002, and was used in this study. 

Dr. Nathan Congdon, MD, MPH, Ulverscroft Chair of Global Eye Health at Queen’s University Belfast said: “The findings of the THRIVE study demonstrate the power of reading glasses in helping reduce poverty. For the cost of only a few dollars a pair, reading glasses have a significant and sustained impact on an individual’s earnings and help others get back into work. Where people are vulnerable to poverty, we can have an immediate and dramatic impact on livelihoods through this extremely simple and cost-effective intervention.”

Asif Saleh, the Executive Director of BRAC said: “I’m excited to announce the findings of the THRIVE study, showcasing the transformative power of a simple yet profound intervention like reading glasses. This landmark research underscores what we at BRAC have always believed – that empowering individuals with even the most basic tools can catalyze immense change. Through initiatives like this, we reaffirm our commitment to providing tools towards sustainable prosperity for everyone.”


Notes to the editor

About THRIVE (Tradespeople and Hand-workers Rural Initiative for a Vision-enhanced Economy)

The THRIVE trial is the first randomized controlled trial to show a link between presbyopia and income. The trial was carried out over eight months in 59 villages across 15 districts in Bangladesh with reading glasses given to 423 community members aged between 35–65 years old, with 401 community members in the control group. In terms of gender, the participant split was 52% male and 48% female. Glasses wear at 8-month follow-up was 88.3% and 7.81% in intervention and control respectively. At baseline, both the intervention and control groups had a self-reported median monthly income of US$35.3. At end line, the median income for the intervention group was US$47.1 compared with US$35.3 for control, a difference of 33.4%.

About VisionSpring

Founded in 2001, VisionSpring is the social enterprise accelerating the use of eyeglasses in emerging and frontier markets. Our mission is to increase lifelong earnings, learning, safety, and well-being through eyeglasses for people vulnerable to poverty. We believe in the wonder of clear vision for everyone and envision a world in which all who need glasses will have them to see well and do well by 2050. As of 2023, VisionSpring corrected the vision of more than 12 million people living on less than $4 per-day, unlocking more than $2.6 billion in income earning potential. VisionSpring has received honours from the Skoll Foundation, Aspen Institute, World Bank, Duke University, and Tribeca Film Festival, among others. Our work has been covered by BBC | The New York Times | The Economist | The Lancet and more. www.visionspring.org


BRAC is an international development organization known for its community-led, holistic approach and delivering long-term impact at scale. BRAC works with communities in marginalized situations, hard-to-reach areas and post-disaster settings across Asia and Africa, with a particular focus on women and children. BRAC innovates, pilots, perfects, and scales poverty solutions. Born in Bangladesh in 1972, BRAC today reaches more than 100 million people in 17 countries.


Based in New York City, BRAC USA is an independent 501(c)3 organization that strengthens BRAC’s impact by raising awareness and mobilizing resources to support and amplify its programs for the people we serve.


Media contact

Sarah Allen, Communications Manager
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