{HEAD ~ The walls} of these vessels leak fluid, which causes scarring in the surrounding tissue and results in reduced vision or loss of {TAIL ~ vision} 
{ HEAD ~ The walls } of these vessels leak fluid , which causes scarring in the surrounding tissue and results in reduced vision or loss of { TAIL ~ vision }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL