Roll vection analysis of suggestion-induced visual field narrowing

Instructions to simulate visual field narrowing resulted in apparently narrow visual fields when these were evaluated by means of conventional perimetry. However, when a pattern of stripes moving around the visual axis was viewed, the magnitude of the induced change in the subjective horizontal or vertical (roll vection) was unaffected. These results demonstrate that conventional perimetric techniques may in some instances be inadequate to demonstrate functional peripheral vision. Evaluation of the peripheral visual field in perimetry, the role of peripheral vision in visually guided behavior, and the effect of stressors on peripheral visual functions are discussed.