Table 5

Aetiology (%) of low vision and blindness in childhood in Britain

RegionYearNoData sourcePrenatal PerinatalChildhood Unclassified5-150
Hereditary Intrauterine Presumed prenatalUnknown
Northern Ireland24 19774865-151 Multiple source national survey5111115022
Scotland29 198799School for visually impaired4812111019
Eire23 1991172Multiple source national survey1642713364
  • 5-150 If an aetiological category cannot be definitely assigned or determined.

  • 5-151 Individuals <20 years with visual acuity of 6/18 or less.