PurposeThe aim of our study was to analyse paediatric sight-impairment trends in Northern Ireland (NI) over a 28-year period to better understand the impact which changes in health-care provision may be having on childhood blindness and to enable us to assess our progress towards achieving the World Health Organisation (WHO) aims.MethodsA database of Certificates of Visual Impairment completed for NI children aged <16 years was used to determine the cause of sight impairment from 1984 to 2011. Causes were classified into preventable or treatable conditions and analysed for trends.ResultsFive hundred and ninety-eight children were registered as having impaired vision over the 28-year period. A total of 22% had preventable or treatable conditions. Optic atrophy was the most common cause responsible for 16% of registrations followed by albinism (12%), cerebral visual impairment (11%), congenital cataract (8%), retinopathy of prematurity (ROP) (8%), and congenital motor nystagmus (7%). The incident rate (per million population aged <16 years) for registerable vision loss due to congenital cataract decreased from 5.89 (CI 2.82-10.83) in 1984-1987 to 2.63 (CI 0.72-6.74) in 2008-2011. For ROP, the incident rate peaked during 2000-2003 at 8.87 (CI 4.85-14.88). Thereafter, there was a statistically significant reduction in incident rate to 1.98 (CI 0.41-5.77) in 2008-2011 (P=0.008).ConclusionsSight-impairment registrations due to preventable or treatable causes have decreased over the past 28 years. This is likely due to better surgical techniques and improved refractive care for conditions such as congenital cataract and ongoing research and treatment protocols for conditions such as ROP. Future advances in this area may help to further reduce the burden of childhood sight impairment and improve quality of life for these patients.