Disability, Independence and Dependency Situations Survey Disabilities, Impairments and State of Health. National results: Absolute figures Population with visual impairments, who use the Braille system, by age and sex Units: thousands of persons 6 years old and over ,Both sexes,Males,Females, Total,11.4,5.8,5.6, 6 to 64 years old,8.1,4.7,3.4, 65 to 79 years old,3.2,1.1,2.1, 80 years old and over,0.1,0.0,0.1, Notes: 1) The data corresponding to cells with fewer than 5 thousand persons must be viewed with caution, because it may be affected by large sampling errors. Source: National Statistics Institute