Objective measurements were carried out to determine the effect of stimulus size on fusional and vergence amplitudes. It was shown that increasing the stimulus size to include peripheral retinal regions results in significant increases in horizontal and vertical fusional amplitudes. This increase is realized by proportionate increases in both motor (vergence) and nonmotor components.
© 1981 Optical Society of America
Andrew E. Kertesz, "Effect of stimulus size on fusion and vergence," J. Opt. Soc. Am. 71, 289-293 (1981)