Complex sentence: Today due to modern medical intervention, including increased premie survival rate "Deaf-blindness" or "Deafblindness" is known as a low incidence disability and within this very small group of there is great variability.
Split into simpler sentences: Today due to modern medical intervention, including increased preterm birth survival rate "Deaf-blindness" or "Deafblindness" is known as a low incidence disability. Within this very small group of there is great variability.