Using an objective infrared technique, the deviation of the mean of accomodation during mono- and binocular fixation and the degree of fluctuation were measured for four male probands. 1. For two men, the additional impulse of convergence in binocular vision reduced deviation and fluctuation. 2. In every case, fluctuation and deviation increased with increasing theoretical value of accomodation. 3. Increased values of accomodation were linked to greater fluctuations so that loss of image quality could be somewhat compensated for.