537例二硫化碳接触者周边视野变化及其临床意义探讨

Significance of peripheral visual field changes in 537 subjects exposed to CS_2

537名接触CS_2工人的周边视野检查结果:视野缩小在10°以内占79.1%,在10°～20°占14.8%、20°～30°占5.2%,大于30°占0.9%。按照流行病学的发病规律和疾病的分级标准,作者建议,在职业史和临床表现基础上,以测定周边视野诊断CS_2慢性中毒。视野缩小10°以内为正常,10°～20°为慢性CS_2中毒的观察对象,20°～30°为慢性CS_2轻度中毒,30°以上为慢性CS_2重度中毒。我们也注意到颞侧视野缩小的发生率明显比鼻侧为高,而左眼较右眼为明显。对此现象尚需进一步研究。

Peripheral visual field of 537 subjects exposed to CS_2 were examined. The results showed that the decrement of peripheral visual field for 10° was 79.1%, for 10°～20° was 14.8%, for 20°～30° was 5.2% and for above 30° was 0.9%. According to the epidemiological pattern and the disease classification guideline, it was suggested that basing on the exposure history and clinical manifestations, the diagnosis of chronic CS_2 poisoning could be assisted by measuring peripheral visual field. Those subjects with the decrement of peripheral visual field less than 10° should be regarded as normal, for 10°～20° as supervised subjects, for 20°～30° aslisht poisoning and for above 30° was severe poisoning. It was also shown that significantly the incidence of decrement of peripheral visual field in temporal side appeared to be more than that in nasal side, and more in left eye than in right, eye. However, this findings need furter investigation.