All these guys sound scared to death,i've had arc flash many many many times in the last 40 years, it does feel like sand, andpotatoe halves always helped me-its just a sunburn of the eyes, now if you stared at this weld flash i could see a doctor. otherwise , forget about it,Mine allways got cleared up within no longer than 3 hours.I worked in nuke plant and welding there is part of ones day. I had no eye infection in probably 25 burns - no kidding} they got better with just a kool compress [potatoes] funny thing the starch in the poteato turned the potatos black.we figured , it had pulled the heat out of our eyes. Its not a good thing to happen to oneself. But its all part of building hotrods just thougt i add alot of burned eyes with me.
ps the part i never understood was this ;i could get "flash" i the pm and i could get it in the morning or even in the evening. The sand effect never ever showed up. til after 10 at night figure that one out