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A takeaway pizza delivery man says the teenagers who squirted him with acid scarring him for life are dangerous and need to be caught.
Imran Khan was targeted twice by the same group of youths on the same night.
The father or five was sitting in his car near a parade of shops in Barking in Essex when two youths ran out and squirted the noxious substance through the window.
He suffered burn injuries to his face neck arm and hands.
Fortunately Mr Collins cries for help were heard by a man in a shop close by who reacted quickly, dowsing him in water.
"If it had not been for the actions of that man my injuries would have been so much worse. I probably would have lost my sight," he said.
A short time before the acid attack Mr Khan had been surrounded by up to 15 youths as he tried to deliverer a pizza at the same address but on that occasion the group ran off.
He is convinced the same group is responsible for both attacks.So far there have been no arrests
Information to Redbridge CID on 0208 345 2751 or Crimestoppers anonymously on 0800 555 111.