The Rapid Assessment of Avoidable Blindness (RAAB) is a rapid survey methodology developed at the International Centre for Eye Health (ICEH). It is a population based survey of visual impairment and eye care services among people aged 50 years and over.

The Bangladesh - Barisal Rapid Assessment of Avoidable Blindness 2013 covered the six regions in within the division of Barisal. A total of 2,498 subjects were interviewed and examined successfully. Data were collected through household interviews and visual examinations. Subjects with vision-impairing cataract were questioned on barriers keeping them from pursuing cataract surgery, and subjects that had undergone cataract surgery were asked about their operations.