WHO Urges Action to Close Cataract Surgery Gap & Prevent Avoidable Blindness

Nearly half of the 94 million people worldwide affected by cataracts – the clouding of the eye’s lens that leads to blurred vision and potential blindness – currently lack access to the surgery that could restore their sight. This urgent need, highlighted in a new study published in The Lancet Global Health, underscores a significant gap in global healthcare access and a challenge the World Health Organization (WHO) is now urging countries to address with renewed focus.

Cataract surgery, a remarkably effective and affordable procedure lasting around 15 minutes, offers immediate and lasting vision restoration. Despite its proven benefits, systemic barriers continue to prevent millions from receiving this life-changing intervention. Over the last two decades, coverage has increased by approximately 15%, but this progress is being outpaced by both aging populations and the rising incidence of cataracts globally. Current projections estimate an 8.4% increase in surgical coverage this decade, falling short of the World Health Assembly’s target of a 30% increase by 2030.

Disproportionate Impact and Regional Disparities

The burden of untreated cataracts is not evenly distributed. The African Region faces the most significant challenges, with three out of four individuals needing cataract surgery unable to access it. Women are also disproportionately affected, consistently experiencing lower rates of access to care compared to men across all regions. This disparity reflects deeper structural inequalities within healthcare systems, including socioeconomic factors, cultural barriers, and limited access to information.

These access issues aren’t simply about a lack of surgical facilities. The WHO identifies several key obstacles: shortages and uneven distribution of trained eye-care professionals, the high cost of surgery for many patients, lengthy waiting lists, and a lack of awareness about available services, even when they exist. Prolonged exposure to ultraviolet (UV-B) radiation, tobacco use, corticosteroid use, and conditions like diabetes can also accelerate cataract development, increasing the overall demand for surgical intervention.

What Does the New Research Tell Us?

The study published in The Lancet Global Health analyzed data from 68 countries, covering estimates for 2023 and 2024. It builds on previous work endorsed by the 74th World Health Assembly in 2021, which set the ambitious goal of a 30 percentage-point increase in effective cataract surgical coverage (eCSC). While the study confirms progress is being made, it also highlights the scale of the work remaining. The researchers emphasize that simply increasing the *number* of surgeries isn’t enough. ensuring equitable access and quality of care are equally crucial.

It’s important to understand that “effective cataract surgical coverage” isn’t just about performing the surgery. It encompasses the entire pathway of care, from initial detection and referral to post-operative follow-up. A truly effective system ensures patients receive appropriate care at every stage, minimizing complications and maximizing positive outcomes. The study’s findings suggest that many countries need to strengthen these supporting elements of their eye-care programs.

Beyond Surgery: A Holistic Approach to Vision Care

Cataracts and other causes of vision impairment represent a substantial global health and economic burden. The WHO estimates that at least 2.2 billion people worldwide live with near or distance vision impairment, with at least 1 billion of these cases preventable or yet to be addressed. The annual global cost of lost productivity due to vision impairment is estimated at US$411 billion. Addressing this requires a broader approach than simply focusing on surgical interventions.

Integrating vision screening and eye examinations into primary healthcare services is a critical step. This allows for earlier detection of cataracts and other eye conditions, facilitating timely referral for treatment. Investing in essential surgical infrastructure, particularly in rural and underserved areas, is also essential. Expanding and better distributing the eye-care workforce – training more ophthalmologists, nurses, and technicians – is crucial to meeting the growing demand for services. The WHO’s fact sheet on blindness and visual impairment provides further detail on the global scope of the problem and the importance of preventative measures.

Addressing Inequities and Prioritizing Vulnerable Populations

The WHO emphasizes the need for targeted efforts to prioritize women and marginalized communities. Addressing the systemic barriers that prevent these groups from accessing care is essential to reducing persistent inequities and ensuring that the benefits of improved access are shared by all. This may involve culturally sensitive outreach programs, financial assistance to cover the cost of surgery, and addressing transportation challenges that prevent patients from reaching treatment centers.

“Cataract surgery is one of the most powerful tools we have to restore vision and transform lives,” says Devora Kestel, Director a.i., WHO Department of Noncommunicable Diseases and Mental Health. “When people regain their sight, they regain independence, dignity, and opportunity.” This sentiment underscores the profound impact that restoring vision can have on individuals and communities.

Looking Ahead: Strengthening Global Efforts

The WHO is calling on governments, civil society organizations, and partners to build on existing momentum, address gender and geographic inequities, and prioritize underserved populations. This requires sustained commitment and investment in eye-care programs, as well as a collaborative approach that brings together stakeholders from across the healthcare system. The goal is ambitious – to move cataract surgery from being out of reach for millions to a universally accessible intervention, ultimately helping to finish avoidable blindness worldwide. Continued monitoring of coverage rates, coupled with rigorous evaluation of interventions, will be essential to track progress and identify areas where further action is needed.