Iris insertion

Angular approach

Peripheral iris

Pigmentation of trabecular meshwork

A Anterior to Schwalbe’s line

0 to 50 deg

r regular

f flat

0 no pigment

B Between Schwalbe’s line and scleral spur

s steep

b bowed anteriorly

1+ minimal

C Scleral spur visible

p plateau iris

2+ mild

D Deep with ciliary body visible

q queer

c concave

3+ moderate

E Extremely deep with > 1 mm of ciliary body visible

4+ intense