The phenomenon of lacrimation after welding is clinically known as electrophthalmia, in which welding light contains ultraviolet light, which causes certain damage to the corneal epithelium. After 3-8 hours of exposure to welding light, redness, swelling, pain, lacrimation, photophobia, eyelid spasm, and blurred vision gradually appear in both eyes. After the diagnosis is confirmed, surface anesthetic eye drops are temporarily ordered once to relieve eye pain symptoms and treated with antibiotic eye drops as well as eye ointment to prevent secondary infection. Use an eye gel that promotes corneal epithelial proliferation to help repair the corneal epithelium. You can apply a cold compress locally and avoid eating a spicy and stimulating diet, avoid smoking, alcohol, staying up late, and visual fatigue, etc. Try not to take a bath to prevent infection from occurring.