"VEGF" refers to "vascular endothelial growth factor"...a protein released by the body...which stimulates the growth of blood vessels.In the case of macular degeneration or diabetic retinopathy...the excess release of VEGF is harmful...causing the growth of abnormal blood vessels...such is in "wet macular degeneration" or "proliferative diabetic retinopathy".
Drugs such as Lucentis or Avastin reduce the growth of abnormal blood vessels by BLOCKING VEGF.
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