The number of people living with disability from age-related eye diseases has climbed significantly over the past three decades, even as treatment has improved. A comprehensive analysis of global health data from 1990 to 2021 found that years lived with disability (YLD) from cataracts, glaucoma, and age-related macular degeneration (AMD) increased across all three conditions, yet age-standardized rates actually declined. This paradox reveals a complex reality: while medicine is getting better at managing eye disease, the world's aging population is creating an unprecedented burden on vision care systems .

The research, published in Eye and Vision, examined data from the Global Burden of Disease Study 2021 to understand how these three major eye conditions are affecting people worldwide. The findings paint a picture of progress shadowed by persistent inequality. "As the global population continues to age, the burden imposed by age-related eye diseases is rising, making vision impairment an urgent public health priority," researchers from the National Clinical Research Center for Ocular Diseases at Wenzhou Medical University noted .

Why Are More People Living With Eye Disease Despite Better Treatments?

The increase in total years lived with disability reflects a straightforward demographic reality: the world is getting older. More people are reaching the ages when cataracts, glaucoma, and AMD typically develop. However, the decline in age-standardized rates, which account for population aging, suggests that treatments and public health efforts are working. Fewer people in each age group are experiencing severe vision loss compared to 30 years ago .

This creates what researchers call a "complex interplay" between demographic aging and public health interventions. The good news is that progress has been made in eye care management and therapy effectiveness. The troubling news is that this progress is not evenly distributed across the globe.

Who Is Being Left Behind in the Eye Care Revolution?

Perhaps the most concerning finding is the persistent inequality in how eye disease burden is distributed worldwide. Lower socioeconomic index countries continue to carry a disproportionate share of the disease burden, despite some improvements since 1990. Researchers found that "the burden remains disproportionately concentrated in lower sociodemographic index countries," highlighting what they describe as "an urgent need for integrated public health strategies that combine eye care with broader environmental and aging-health initiatives" .

In Singapore, this challenge is particularly acute. The city-state is aging faster than most developed nations, with 20.7% of citizens aged 65 and older as of June 2025, up from 13.1% in 2015. The number of citizens aged 80 and above has surged 60% to 145,000 in just a decade. Yet despite access to advanced eye care, a landmark study found that 35.8% of Singaporeans aged 60 and older have at least one undiagnosed age-related eye disease .

The scale of undetected disease is staggering. Nearly 90% of AMD and diabetic retinopathy cases, 41% of cataracts, and 48% of glaucoma cases go undetected in the region, leading to preventable vision loss and higher healthcare costs .

How Can Primary Eye Care Providers Close the Detection Gap?

• Comprehensive Screening: Registered optometrists perform thorough eye examinations using advanced technology including retinal imaging, optical coherence tomography (OCT), and digital refraction to detect early signs of glaucoma, cataracts, AMD, and diabetic retinopathy before symptoms appear.
• Accessible First Contact: Optometrists serve as the first and most accessible point of contact for vision health, making them essential gatekeepers for early detection in communities where specialist ophthalmologists may be scarce or expensive.
• Systemic Health Monitoring: Eye examinations can reveal indicators of broader health conditions like diabetes and hypertension, allowing optometrists to identify systemic disease before other symptoms emerge.
• Tailored Vision Correction and Support: Beyond detection, optometrists provide appropriate spectacles, contact lenses, and low-vision aids that help seniors continue reading, driving, and enjoying daily activities while managing stable chronic conditions.
• Patient Education and Prevention: Optometrists deliver vital guidance on ultraviolet (UV) protection, nutrition, and lifestyle habits that slow disease progression and help patients understand their conditions.

As the Singapore Optometric Association notes, "as the population ages, optometrists are increasingly tasked with managing conditions such as presbyopia and cataracts. Their work ensures that seniors maintain their independence and quality of life through improved vision care" .

The benefits of good vision extend far beyond clearer sight. Improved vision reduces the risk of falls, supports mental well-being, and helps seniors remain socially and economically active. In Singapore's context of high myopia prevalence and rapid demographic change, optometrists are essential partners in community eye health, freeing specialist resources while delivering timely, preventive care .

With demand for eye services rising 23% over the past decade, proactive eye care is no longer optional. It is a cornerstone of healthy aging. The research makes clear that while medical advances have improved outcomes for those who receive care, the real challenge lies in reaching the millions who remain undiagnosed and unaware that their vision is at risk.