• The central corneal thickness, peripheral corneal thickness, central anterior chamber depth, and peripheral anterior chamber depth were measured from 110 phakic eyes using attachments 1 and 2 to the slitlamp (Haag-Streit). The Shaffer grading system was used for the width of the anterior chamber angle. The results showed that both the average central anterior chamber depth and peripheral anterior chamber depth increased in a linear manner with the Shaffer grading system of the width of the anterior chamber angle. In addition, our "scattergram" showed that each Shaffer grading of the angle width could almost be uniquely determined by the combination of central and peripheral anterior chamber depths. However, the peripheral anterior chamber depth is the best single factor in predicting the Shaffer grading of the width of the anterior chamber angle.
Chan RY, Smith JA, Richardson KT. Anterior Segment Configuration Correlated With Shaffer's Grading of Anterior Chamber Angle. Arch Ophthalmol. 1981;99(1):104-107. doi:10.1001/archopht.1981.03930010106013