However, the inventive method of treating {TAIL ~ patients} with both PDT and scatter threshold laser coagulation therapy surprisingly either improved vision, or prevented further loss of {HEAD ~ vision} 
However , the inventive method of treating { TAIL ~ patients } with both PDT and scatter threshold laser coagulation therapy surprisingly either improved vision , or prevented further loss of { HEAD ~ vision }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD