WHEN BACKING A FORKLIFT OUT OF THE KILN, EE'S VISION WAS OBSTRUCTED DUE TO THE FLASH FROM A PERSON ARC-AIRING BELOW THE KILN DISCHARGE LIP. THE FLASH ON HIS EYES CAUSED HIM TO HIT THE HANDRAIL ON THE RAMP GOING INTO THE KILN WITH THE FORKLIFT. WAS EVALUATED BY A PHYSICIAN AND MEDICATION WERE ORDERED FOR HIS EYES.