Ⅰ级:前房积血量在前房容积的1/3以下，血平面位于瞳孔下缘之下；
Ⅱ级:前房积血量在前房容积的1/2以下，血平面超过瞳孔下缘之下；
Ⅲ级:前房积血量在前房容积的1/2以上，甚至布满整个前房。
血液积于前房的容量可分为3级：少于1/3为Ⅰ级；介于1/3～2/3为Ⅱ级；多于2/3为Ⅲ级。
Ⅰ级:前房积血液平面在角膜的1/4以下；
Ⅱ级:前房积血液平面在角膜的1/4~1/2；
Ⅲ级:前房积血液平面在角膜的1/2~3/4;
Ⅳ级:前房积血液平面在角膜的3/4以上.
血液积于前房的容量可分为5级：无明显积血，裂隙灯可见散在红细胞漂浮为0级；少于1/3为Ⅰ级；介于1/3～1/2为Ⅱ级；多于1/2为Ⅲ级；满前房为Ⅳ级。
Grade 0 (microhyphema): No visible pooling of blood, but red blood cells can be seen within the anterior chamber upon microscopic examination.
Grade 1: Pooling of blood in less than the lower third of the anterior chamber.
Grade 2: Blood filling one third to one half of the anterior chamber.
Grade 3: Blood filling one half to less than all of the anterior chamber.
Grade 4: Total filling of the anterior chamber with blood. If the blood is bright red, this is called a total hyphema. If it is dark red-black blood, it's sometimes called an "8-ball hyphema."
