• A modification of Zeiss' four-mirror goniolens for static and dynamic indirect gonioscopy in the office and during surgery has been designed. The lens is also used for determining the position of the haptics of anterior chamber-fixated intraocular lenses at the time of placement. Advantages of this lens compared with Zeiss' lens are discussed.
Posner RE. New Diagnostic and Surgical Gonioprism. Arch Ophthalmol. 1978;96(3):501-502. doi:10.1001/archopht.1978.03910050269016