Deaf-blindness is a condition that affects an individual's ability to see and hear. This dual sensory loss can vary in severity, meaning some people may have partial vision and hearing, while others may have none. It can result from various causes, including genetic conditions, illness, or injury, and it significantly impacts communication and mobility. Individuals with deaf-blindness often rely on alternative methods to interact with the world, such as tactile sign language or braille. Support from trained professionals, like interveners or special educators, is crucial in helping them develop skills for daily living and social interaction.