During operations for retinal detachment, the surgeon usually guides the diathermy applicator to the retinal break either by shining the ophthalmoscope light through the break and sclera, or by indenting the sclera with the electrode and observing the position of the identation through the binocular indirect ophthalmoscope.2 It is often difficult to be sure the observed indentation is caused by the tip of the diathermy electrode and not by the shaft or by a speculum.
Dagleish2 used a curved indentor which creates a clearly seen indentation. Strampelli3 used a transilluminator with a diathermy wire beside its tip.
In the instrument to be described,* the diathermy current is conducted along a wire electrode which runs through the center of a transilluminating glass applicator (Fig 1).The instrument (Fig 2) consists of a handle containing a small light, a conductor for diathermy current, and a control switch. The
QUEREAU JVD, STREISINGER E. Transilluminating Diathermy Applicator for Retinal Detachment Surgery. Arch Ophthalmol. 1965;74(5):663-664. doi:10.1001/archopht.1965.00970040665013