Updates in the Management of Diabetic Macular Edema

Table 1

Grading of foveal avascular zone using fluorescein angiography. ^*As defined in the ETDRS group report 11.

Grade	Outline of FAZ	Size of FAZ	Capillary loss
Grade 0	Outline of FAZ normal	Size of FAZ less than the area of the 300 µm radius circle^*	Capillary loss absent
Grade 1	Outline of FAZ not smoothly round or oval-shaped. Appreciable irregularities seen but not necessarily abnormal	Size of FAZ equal to area of the 300 µm radius circle^*	Capillary loss questionable
Grade 2	Outline of FAZ obviously damaged but limited to less than half of the circumference	Size of FAZ greater than the 300 µm radius circle^* but less than the 500 µm radius circle^*	Capillary loss definitely present
Grade 3	Outline of FAZ destroyed for at least half the circumference, with some remnants still present	Size of FAZ greater than or equal to the 500 µm radius circle^*	Moderate capillary loss
Grade 4	Capillary outline totally destroyed		Severe capillary loss
Grade 8	Cannot be graded	Cannot be graded