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