How is hematuria classified?

Hematuria may be classified according to its visibility and timing during the urinary stream a/ Gross hematuria : seen by naked eye – Can be total, initial or terminal depending on the source b/Microscopic hematuria : not visible to the naked eye and it is a sign rather than a symptom; a laboratory diagnosis defined as the presence of red blood cells on microscopic examination of urine – three or more RBCs/HPF