<prompt> Von hericks angle grade 3 of anterior chamber denotesWide open angleModerately open angleModerately narrow angleClosed angle  <response>: Von Hericks 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 1:12 Moderately open angle VH grade 3 1: 14 Moderately narrow angle VH grade 2 1: 14 angle closure likely VH grade 1 