Vision 2020 is crucial in the field of epidemiology because it addresses the public health burden posed by visual impairment and blindness. According to epidemiological studies, around 80% of all visual impairment can be prevented or cured. By focusing on the major causes of blindness, such as cataracts, glaucoma, and diabetic retinopathy, Vision 2020 aims to reduce the prevalence of these conditions and improve the overall quality of life.
