Cataracts are a common eye condition that causes clouding of the natural lens, leading to blurry vision and impaired sight. Typically associated with aging, cataracts can develop gradually over time and affect one or both eyes. Key symptoms include blurred or dim vision, increased sensitivity to light, difficulty seeing at night, and seeing halos around lights. Causes range from age-related changes to prolonged UV exposure, smoking, diabetes, and certain medications. This comprehensive guide will explore the underlying causes of cataracts, their symptoms, and how to recognize early signs for timely diagnosis and treatment.