The MAJOR disadvantage of cryoextraction is the necessity of and dependence on a skilled assistant. The method requires the assistant to participate in the most delicate and crucial maneuvers of the procedure. This new method and instrumentation enables the surgeon to do round pupil cryoextraction without assistance. A self-retaining iris retractor and self-retaining corneal elevator leave the surgeon's hands free to carry out the extraction.
The instrumentation consists of (1) a selfretaining corneal elevator, (2) a self-retaining iris retractor, (3) a modified speculum (Park) to which the corneal elevator and iris retractor attach, and (4) a combined forceps-defroster.
The corneal elevator and iris retractor are attached to the 3 mm square posts on the speculum (Fig 1). These are held firmly in position when attached, however, can be slid on and off with ease (Fig 2). The corneal elevator has a harp-shaped spring on one end which accepts the
Becker SC. Cryoextraction Without Assistance. Arch Ophthalmol. 1968;80(2):225-229. doi:10.1001/archopht.1968.00980050227016