Strachan I M, Brown B H, Johnson S G, Robinson P
Trans Ophthalmol Soc U K (1962). 1975 Apr;95(1):85-7.
An apparatus for measuring muscle forces in strabismus has been developed. The globe is fixed with a modified suction cup, force applied is measured by strain gauges, and the excursion of the globe is measured by a light pointer and tangent screen. The values of force generation tests for normal horizontal rectus muscles performing 30 degrees saccades lie mainly within the range of 60 to 80 G.