Table 2.

XV-based functional grading of CEE-System

Grade	CD (cells/mm2)	XV	<XVn_th (%)	å XVd_th (%)	Annotation
Ⅰ	> 2000	0.2~0.28	>71.4%	0	Normal function
Ⅱ	2000-1000	0.28~0.43	71.4~11.4%	0~0.3%	Below normal physiological conditions
Ⅲ	1000-500	0.43~1.40	<11.4%	0.3~7.2%	Impaired corneal endothelial function, clinically insignificant
Ⅳ	500-300	1.40~2.67	0	7.2~41.2%	Inner eye surgery may lead to bullous corneal lesions
Ⅴ	<300	> 2.67	0	> 41.2%	Has already developed or is highly susceptible to bullous corneal lesions