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