Approximately 40 million people in the world are blind and another 100 million have substantial visual impairment. The principal causes of blindness and visual disability are quite distinct in developed as compared with developing countries, and where they overlap in name (e.g., cataract and glaucoma), the prevailing epidemiology is very different. In underdeveloped settings, cataract, glaucoma, trachoma, onchocerciasis, vitamin A deficiency, and other related sources of childhood blindness predominate as the causes of blindness. Other important causes include leprosy, corneal scarring from infection, and trauma.
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There are approximately 10 million cases of other neuropsychiatric conditions in India including stroke, TIA, Parkinson's disease, vascular dementia, Alzheimer's dementia (100,000), migraine, epilepsy, cluster headache, neuropathies - diabetic & non-diabetic, brain tumors, multiple Sclerosis, meningitis, MDD, schizophrenia, attention deficit hyperactivity disorder, anxiety disorder, bipolar disorder, panic disorder, depression, psychosis and obsessive compulsive disorder. A prevalence rate for all mental disorders was observed to be 65.4 per 1000 population. Prevalence rates for schizophrenia, affective disorders (depression), anxiety neurosis, hysteria and mental retardation were 2.3, 31.2, 18.5, 4.1 and 4.2 per 1000 population respectively. |
