Bryars J H, Archer D B
Trans Ophthalmol Soc U K (1962). 1977 Apr;97(1):26-9.
A survey of visually h,ndicapped children in Northern Ireland identified 486 subjects aged 0 to 20 years on January 1, 1976, with a corrected visual acuity of 6/18 or less in the better eye. The prevalence of visual handicap was 81/100,000 of the population with an estimated ascertainment rate of 80%. Genetically determined diseases accounted for 51% of the cases. Birth hypoxia secondary to prenatal and perinatal complications was the second most important aetiological factor contributing towards visual handicap.
对北爱尔兰视力障碍儿童进行的一项调查发现，在1976年1月1日，有486名年龄在0至20岁之间的受试者，其较好眼睛的矫正视力为6/18或更低。视力障碍的患病率为每100,000人口中有81例，估计确诊率为80%。遗传性疾病占病例的51%。产前和围产期并发症继发的出生时缺氧是导致视力障碍的第二大重要病因。
