Children with Multiple Disabilities and Vision Impairment (MDVI) have a vision impairment and at least one other disability, which could be cognitive, developmental, and hearing- or mobility-related. Many of these children face challenges with communication, social interactions, movement, and independent living skills. Interventions that might typically work for a child who has one disability don’t necessarily work for children with MDVI because each disability has a compounding effect.
Children with MDVI might communicate in ways that are different from other people — a child might use nonverbal communication or sign language. They may not process visual cues to understand their surroundings the way someone with typical vision does. These circumstances require special adaptations of environment and teaching interventions so children are able to learn about the world around them.
The 2011 India Census reports incidences of disability in eight categories, including multiple disabilities. Based on Perkins’ experience and other sources   , we estimate that 70% of those with multiple disabilities have a vision impairment as one of their disabilities, indicating they have MDVI. This would leave us with 474,909 children (ages 0-19) with MDVI according to the 2011 Census.
However, experts argue that actual numbers of persons with disabilities are much higher compared to the 2011 census results   . Using Perkins International global estimates, we believe there may be as many as 949,329 children (ages 0-19) with MDVI, almost double what might be indicated by the census!
Globally, Perkins International estimates there to be 6 million children and young adults (ages 0-24) with MDVI. This estimate is based on the World Health Organization’s Global data on visual impairment: 2010, which indicates the number of children with vision impairment that is not easily diagnosed and corrected. It is understood by experts in the field that about half of children with uncorrected vision impairment have an additional disability . Using this information, we can deduce a prevalence rate and apply it to global population data.
When applying the prevalence rate to the same 2011 population data, it comes to 949,329 children (ages 0-19) with MDVI in India – rounded up to 1 million children.
We know, it’s complicated! We have done our due diligence to ground estimates in reliable data and logical assumptions to the extent possible, but acknowledge that they are imperfect extrapolations.
To come to a clearer understanding of the actual number of children with MDVI, we look forward to finding, documenting, and counting children with MDVI through our work of identification and intervention. As we systematically count children with MDVI and collect data, we’ll compare our results to the 2011 benchmark data to see how it compares.
 FamilyConnect. (2019). Children with Multiple Disabilities Need the Expanded Core Curriculum, Too! Retrieved from https://www.familyconnect.org/info/education/expanded-core-curriculum/children-with-multiple-disabilities/125
 Arora NK, Nair MKC, Gulati S, Deshmukh V, Mohapatra A, Mishra D, et al. (2018). Neurodevelopmental disorders in children aged 2–9 years: Population-based burden estimates across five regions in India. PLoS Med, 15(7): e1002615. Retrieved from https://doi.org/10.1371/journal.pmed.1002615
 Van Den Broek, E. G. C., Janssen, C. G. C., Van Ramshorst, T., Deen, L. (2006). Visual impairments in people with severe and profound multiple disabilities: an inventory of visual functioning. Journal of Intellectual Disability Research, 50(6). 470-475. Retrieved from https://onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2788.2006.00804.x
 Palmer, M., Harley, D. (2012). Models and measurement in disability: an international review. Health Policy and Planning, 27(5). 357-364. Retrieved from https://academic.oup.com/heapol/article/27/5/357/749458
 Saikia, N., Bora, J. K., Jasilionis, D., Shkolnikov V. M. (2016). Disability Divides in India: Evidence from the 2011 Census. PLOS ONE, 11(8). Retrieved from https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0159809
 Zambone, A. M., Ciner, E., Appel, S., Graboyes, M. (2000). Children with Multiple Impairments In B. Silverstone, M. A. Lang, B. P. Rosenthal, E. E. Faye (Vol. 1), The Lighthouse Handbook on Vision Impairment and Vision Rehabilitation (pp. 451-468). New York, NY: Oxford university Press.