3D Tecnology

Recent increased usage of stereo displays has been accompanied by public concern about potential adverse effects associated with prolonged viewing of stereo imagery. There are numerous potentialsources of adverse effects, but we focused on how vergence–accommodation conflicts in stereo displays affect visual discomfort and fatigue. In one experiment, we examined the effect of viewing distance ondiscomfort and fatigue. We found that conflicts of a given dioptric value were slightly less comfortable at far than at near distance. In a second experiment, we examined the effect of the sign ofthe vergence–accommodation conflict on discomfort and fatigue. We found that negative conflicts (stereo content behind the screen) are less comfortable at far distances and that positive conflicts(content in front of screen) are less comfortable at near distances. In a third experiment, we measured phoria and the zone of clear single binocular vision, which are clinical measurements commonlyassociated with correcting refractive error. Those measurements predicted susceptibility to discomfort in the first two experiments. We discuss the relevance of these findings for a wide variety ofsituations including the viewing of mobile devices, desktop displays, television, and cinema.
Uso reciente aumento de las pantallas estéreo ha sido acompañado por la preocupación pública sobre lospotenciales efectos adversos asociados con la exposición prolongada de las imágenes estéreo. Existen numerosas fuentes potenciales de efectos adversos, pero nos hemos centrado en cómo los conflictosalojamiento convergencia en las pantallas estéreo afectar el malestar y la fatiga visual. En un experimento, se examinó el efecto de la distancia de visualización de la incomodidad y la fatiga. Se encontró quelos conflictos de un determinado valor dióptrico fueron un poco menos cómodo en el momento que a una distancia de cerca. En un segundo experimento, se examinó el efecto de la señal de la vergencia...