Table 1 Wurzburg bleb classification score. Four parameters are evaluated including vascularity, crockscrew vessels, encapsulation and bleb microcysts

Vascularity

3 = Avascular

2 = similar to adjacent conjunctiva

1 = increased

0 = massive

Corkscrew vessels

3 = None

2 = in one third

1 = in two thirds

0 = entire bleb

Encapsulation

3 = None

2 = in one third

1 = in two thirds

0 = entire bleb

Bleb microcysts

3 = entire bleb

2 = lateral or medial of the flap

1 = over the scleral flap

0 = none