Deafblindness, or dual sensory impairment, is a relatively rare condition, affecting approximately 1 in every 4,000 individuals worldwide. The exact prevalence of deafblindness can vary depending on the population being studied and the specific definition of deafblindness being used.
It’s important to note that deafblindness can occur at any age and can be caused by a variety of factors, including genetics, prenatal exposure, acquired conditions, and degenerative diseases. As the global population ages, the number of individuals with age-related degenerative conditions, such as age-related macular degeneration, is likely to increase, which may result in an increase in the prevalence of deafblindness.