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—The Haag-Streit attachments for the measurement of the corneal thickness and anterior chamber depth were designed from principles developed by Jaeger (Albrecht Von Graefes Arch Klin Exp Ophthalmol 1952;153:120-131) (Heidelberg) in 1952.These attachments are commercially available and have been used for almost two decades by many observers to measure the corneal thickness and the anterior chamber depth under a variety of circumstances.To our knowledge, our article was the first to report the use of the instrument to measure corneal thickness and central anterior chamber depth and to correlate this with angle width as seen on gonioscopy.Thus, by using our calculations, which were published in the article, an estimation of the anterior chamber angle width can be made in those clinical situations where gonioscopy is impossible or where there is no trained gonioscopist available.
Smith JA. Anterior Segment Configuration-Reply. Arch Ophthalmol. 1982;100(1):164. doi:10.1001/archopht.1982.01030030166025