A combination perimeter and campimeter is described which is designed for every-day clinical work. It takes a middle course between the very elaborate instruments for laboratory use and the very simple ones intended only for use in obtaining approximate results. It embodies several novel features which I believe help to make field testing more rapid and less fatiguing to both doctor and patient.
DESCRIPTION OF THE INSTRUMENT
The arc of the perimeter, 9.2 cm., is sufficiently broad to supply an adequate background for both fixed and moving targets. The radius of the arc is 315 mm., which is a convenient working distance and yet long enough for good clinical work.
Fixation Target.—The instrument aims to make fixation steadier and more restful by supplying a variety of fixation targets. These can be interchanged by the turn of a finger, and thus several fixation targets can be provided in order
Pascal JI. AN IMPROVED PERIMETER-CAMPIMETER. Arch Ophthalmol. 1936;16(1):103–105. doi:10.1001/archopht.1936.00840190113014
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