EMPLOYEE WAS USING CUTTING TORCHES TO CUT A 48"" X 16"" X 3/4"" PIECE OF METAL OUT SO THAT IT COULD BE REPLACED. HE DID THIS FOR MOST OF THE DAY. AT THE END OF HIS SHIFT HIS EYES HURT & HE COULD NOT SEE WELL. HE WAS WEARING A FACE SHIELD WITH #12 LENS ALONG WITH TINTED SAFETY GLASSES.