Von herick's angle grade 3 of anterior chamber denotes
Wide open angle
Moderately open angle
Moderately narrow angle
Closed angle
Von Herick's technique compares the depth of peripheral anterior chamber with the corneal thickness. The method involves a narrow slit of light from a slit lamp being projected on to the peripheral cornea at an angle of 60deg as near as possible to the limbus. Ratio Angle closure Angle grade 1:1 open angle VH grade 4 1:1/2 Moderately open angle VH grade 3 1: 1/4 Moderately narrow angle VH grade 2 1: <1/4 angle closure likely VH grade 1
Glaucoma