Portable xenon arc light coagulator

Abstract

This clinical trial of the Log-2 portable xenon arc light coagulator shows it to be fundamentally the same as Meyer-Schwickerath's Zeiss instrument. The principal difference between these instruments is the uniformity of the coagulation "source" in the Log-2. Theoretical considerations and the present, admittedly limited, experience suggest that this is advantageous. This instrument is small and easy to handle. The observation system is very clear, the supplementary electronic controls are helpful, and it is a distinct advantage that it can be run on regular household current. The disadvantages are that the patient's pupil must be wider than 5 5 mm., the 2° image field aperture cannot always be used, and a very fair patient with hazy media may not develop a retinal coagulum.