Why arc welding can hurt people's eyes?

Electro-optic ophthalmitis (EO) is an acute conjunctivitis or corneal inflammation caused by ultraviolet (UV) radiation from electric welding. The disease is common among welders and auxiliary welders without protective masks or glasses, or bystanders who weld poplar and disinfect workers after flooding with ultraviolet light. In short, anyone exposed to ultraviolet light, such as pestles do not pay attention to wearing protective glasses, can cause electro-optic ophthalmitis. Electro-optic ophthalmitis is characterized by a certain incubation period, that is, when the welding does not cause any symptoms. It usually takes 6 to 10 hours after welding. Because of the ultraviolet radiation damage to the conjunctiva and cornea, the patient began to feel the pain or burning sensation of foreign bodies in the eyes, followed by hard to bear, tears, open eyes, some severe pain can not fall asleep, conjunctiva congestion is more serious, corneal epithelial cells necrosis and exfoliation. When stained with 2% myomin, diffuse punctate coloration and pupillary dilation were seen. The longer the time of exposure to ultraviolet radiation, the more severe the corneal injury, and the more coloring spots. After about 24 hours, ocular symptoms gradually subsided and disappeared, and corneal epithelial lesions gradually returned to normal, with a few people having symptoms lasting more than two days.

The treatment of electro-optic ophthalmia is relatively simple. After the onset of the disease, you can first drop 1-2 drops of 1% Caine or 2% procaine pain, so that patients open their eyes, after the use of 2% procaine 4 ml (2) plus 10.1% epinephrine 2 ml (2) injection mixed together in eyedrops bottles, every 1-2 hours, you can also use fresh human milk eye drops, 1-2 small traps Once. Thorium moxibustion also has a certain effect. Acupoints are bilateral Hegu, sun, bamboo storage, retaining the needle for 20 minutes.

Prevention of electro-optic ophthalmitis, mainly in the burning wear protective mask, bystanders or aid workers also play attention to wear protective glasses. Do not look at ultraviolet lamp when disinfecting with ultraviolet lamp. Do a good job of propaganda and education in peacetime, so that the masses understand the prevention of electro-optic ophthalmitis knowledge, can not be belittled that electro-optic ophthalmitis will not cause blindness and not pay more attention. If you forget to wear protective glasses when you burn the welding, it is better to use the medicine to treat electro-optic ophthalmitis after work.