The sensitivity and specificity of the Van Herick slitlamp test and the oblique illumination test for estimating the clinical depth of the anterior chamber were found to be sensitive methods of determining shallow anterior chambers. The same tests showed a high sensitivity in separating patients with and without known attacks of angle-closure glaucoma. It is suggested that the use of either of these tests seems a reliable way of spotting the shallow anterior chambers that can lead to subsequent angle-closure glaucoma attacks.
Vargas E, Drance SM. Anterior Chamber Depth in Angle-Closure GlaucomaClinical Methods of Depth Determination in People With and Without the Disease. Arch Ophthalmol. 1973;90(6):438-439. doi:10.1001/archopht.1973.01000050438005