Corneal blindness remains one of the leading causes of visual impairment worldwide, affecting millions of people and posing a significant public health challenge.
In India, 20,000 to 25,000 new cases are reported annually, accounting for approximately 7.5% of the country’s total blindness burden.
Dr. Smit Bavaria, Cataract Surgeon, Wadala, Mumbai, Dr Agarwals Eye Hospital says the causes of corneal blindness are shifting from infectious diseases like keratitis to more prevalent issues such as eye trauma and complications from other conditions, particularly in rural areas where access to care is limited.
Keratitis typically progresses from mild irritation, redness, or vision impairment to severe scarring or opacity of the cornea, leading to partial or complete loss of vision if left untreated. However, treatment is most effective in patients who receive early intervention, especially those with infections or minor injuries that have not yet caused deep corneal damage.
Without timely treatment, many patients, particularly in rural or underserved areas, develop irreversible blindness.
The statistics are alarming: about 1–2% of India’s population, roughly 12 lakh people, are at risk of corneal blindness, primarily due to infections, eye injuries, and nutritional deficiencies like vitamin A deficiency. Poor hygiene, delayed treatment, and inadequate access to healthcare further compound the issue.
Dr. Preethi Naveen, Senior cornea and refractive surgeon, Medical Director, Dr Agarwals Eye Bank, Chennai elaborated: “Corneal blindness is a significant cause of vision loss in India, affecting approximately 12 Lakh people. India’s high prevalence of corneal blindness is primarily due to infections like trachoma and keratitis, eye injuries in industrial and agricultural settings, and widespread vitamin A deficiency.
Poor hygiene, delayed medical interventions, and limited access to healthcare, particularly in rural areas further aggravate the problem. Children and working-age adults in rural areas are particularly susceptible due to malnutrition, frequent eye injuries, and limited healthcare access. Elderly individuals are also at risk due to degenerative eye conditions. Overall, an estimated 1–2% of India’s total population is at risk of developing corneal blindness”.
Dr. Preethi Naveen added, “Current diagnostic methods for corneal blindness in India include a comprehensive eye examination, visual acuity testing, and slit-lamp biomicroscopy, which allow ophthalmologists to assess corneal clarity and identify conditions like keratitis, ulcers, or scarring. Advanced imaging techniques such as anterior segment optical coherence tomography (AS-OCT) and corneal topography provide detailed assessments of corneal thickness and surface irregularities, aiding in accurate diagnosis.
“Corneal transplantation or therapeutic interventions are also highly successful in individuals without significant underlying health conditions, such as diabetes or severe immune disorders, which may complicate recovery.”
Dr. Sanjana Vatsa, Cornea and Refractive eye Surgeon, Bengaluru, Dr Agarwals Eye Hospital said: However, challenges in accessibility and healthcare disparities persist, highlighting the need for continued and targeted interventions. Many patients in rural areas lack access to quality eye care services, which often results in irreversible corneal damage before they seek help. Additionally, there is a substantial gap in training and resources for healthcare providers, limiting their ability to effectively manage and treat corneal conditions. Shortage of corneal donors is also one of the major barriers, as there are few organized corneal transplant programs in place.
Despite efforts to promote eye donation and corneal transplantation, the demand for corneas significantly outpaces supply, with only 25,000 to 30,000 corneal donations annually against a need for 200,000 transplants. Socio-economic factors, such as poverty and malnutrition, exacerbate the risk of corneal blindness, making it difficult to implement comprehensive prevention and treatment strategies.
“Reducing the incidence of corneal blindness in India requires a multi-faceted approach.
At individual level, there is a need to increase awareness about eye health, encouraging routine eye check-ups to identify and treat issues at an early stage.
“Launching initiatives focused on eye health education and the importance of corneal donation can increase public participation. Implementing programs to address nutritional deficiencies, particularly vitamin A supplementation in vulnerable populations, can reduce corneal-related issues.” added Dr. Vatsa.
AI Shows Promise in Diagnosing Infectious Keratitis
A new study published in eClinicalMedicine reveals that deep learning models can accurately diagnose infectious keratitis, a leading cause of corneal blindness. Led by Dr. Darren Ting from the University of Birmingham, the meta-analysis reviewed 35 studies and found that AI matched ophthalmologists in diagnostic accuracy, achieving 89.2% sensitivity and 93.2% specificity, compared to ophthalmologists’ 82.2% sensitivity and 89.6% specificity.
Global Solutions Needed to Eradicate Corneal Blindness
Despite progress in medical research and surgical techniques, innovative global solutions are essential to combat corneal blindness. An initiative launched recently seeks to unite experts, researchers, and clinicians to explore cutting-edge advancements, novel therapeutic strategies, and comprehensive approaches to address this significant health issue. Those interested to contribute kindly click the link given below for more details
