What Is the Meaning of V

Visual impairment is when someone has trouble seeing clearly, and this difficulty isn’t completely fixed by wearing glasses, contacts, or even with surgery. It covers a broad range of problems—from slightly blurry vision to significant loss of sight. When a person has visual impairment, everyday activities such as reading, driving, or recognizing faces might become hard. Researchers study visual impairment to understand how many people around the world have difficulties with their vision and what causes these problems. Conditions like cataracts, age-related macular degeneration, or uncorrected refractive error can all lead to visual impairment. The Global Burden of Disease Study, for example, tracks causes and trends in vision loss to help improve care and prevent avoidable blindness. Overall, visual impairment affects how well people function in daily life, and efforts to prevent and treat it are important for helping people maintain their independence and quality of life.