Disability, Independence and Dependency Situations Survey Disabilities, Impairments and State of Health. National results: Relative figures Percentage of persons with visual impairments, who use Braille, by age and sex Units: percentage Both sexes Males Females Total 1.16 1.56 0.92 6 to 64 years old 2.64 3.18 2.14 65 to 79 years old 0.95 0.90 0.98 80 years old and over 0.03 0.00 0.05 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