1. World Health Organization, Visual impairment and blindness, Available from: URL: http://www.who.int/mediacentre/factsheets/fs282/en/index.html . Accessed on 10 August, 2009.
2. Rehabilitation Council of India. In: Kundu CL, editor. Status of Disability in India. Ministry of Welfare, Government of India, New Delhi 2000. p.10–18.
3. Jan JE, Freeman RD, Scott EP. Visual impairment in children and adolescent. In: Rutter M, Taylor E, Hersov L, editors. Child and Adolescent Psychiatry, Modern Approaches (3rd edition), Blackwell Science 2000. p.729.
4. Koenes SG, Karshmer JF. Depression: A comparison study between blind and sighted adolescents. Issues Ment Health Nurs. 2000;21:269–279.
5. Goldberg DP, Hillier VF. The detection of psychiatric illness by questionnaire. Psychol Med. 1979;9:139–135.