Preventable blindness refers to vision loss that can be avoided through timely medical intervention, education, and lifestyle changes. Common causes include untreated cataracts, glaucoma, and diabetic retinopathy. Regular eye exams and early treatment can significantly reduce the risk of severe vision impairment. Many organizations, such as the World Health Organization, promote awareness and prevention strategies to combat this issue. Public health initiatives focus on improving access to eye care services, educating communities about risk factors, and encouraging healthy habits. By addressing these factors, preventable blindness can be significantly reduced worldwide.