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电焊、气焊、氩弧焊、等离子焊接时、温度可升高到3000℃以上,可产生短于290毫微米波长的紫外线。波长短于290毫微米的紫外线,短时间照射眼睛后,经过4～12小时的潜伏期,开始出现两眼怕光、异物惑、流泪、随后刺痛或灼痛、眼睑痉挛,并常有头痛及视物模糊。患者常因不能忍耐痛苦,多在夜间急诊。轻症患者一般发病4～8小时后,大部分症状可以减轻,2～3日内痊愈。重症患者,经一周左右亦可痊愈,无后遗症。长期小剂量的接触
Welding, gas welding, argon arc welding, plasma welding, the temperature can be raised above 3000 ℃, can produce shorter than 290 nm wavelength ultraviolet light. Wavelength shorter than 290 nm UV, short exposure to the eyes, after 4 to 12 hours of incubation, began to appear afraid of light, foreign body confusion, tearing, followed by stinging or burning, blepharospasm, and often have headaches and Blurred vision Patients often can not stand the pain, more emergency at night. The general incidence of mild disease after 4 to 8 hours, most of the symptoms can be alleviated, recovered within 2 to 3 days. Severe patients, after about a week can be cured, no sequelae. Long-term low-dose exposure