A new method of estimating the depth of the anterior chamber

Abstract

Measurement of the depth of the anterior chamber can be carried out under clinical conditions by means of the attachment to the Haag Streit 900 slit lamp, which is based on the method of Jaeger (1952). Photographic measurements can be made as described by Heim (1941), Bleeker (1960, 1961), and Brown (1973), and ultrasonic techniques can also be used. An ingenious optical device embodying 2 pairs of apertures, each providing independently focusing double pencils - 1 pair to be coincident on the corneal endothelium and 1 on the lens capsule - was described by Stenstrom (1953) as a modification of a device invented by Lindstedt (1916). All these methods, however, require the use of special attachments to the slit lamp, with or without photographic techniques in addition. The method to be described uses the standard model Haag Streit 900 slit lamp alone; no extra apparatus is required.