Quasi-Monochromatic Visual Environments and the Resting Point of Accommodation

摘要

This investigation explored the importance of color as a factor in deterioration of correct visual accommodation and involuntary regression to the resting point of accommodation. The involvement of voluntary control of accommodation processes was manipulated by requiring extended performance on a difficult visual task. Broad band red and green as well as white visual environments were presented in two related experiments. The first considered color, light level and time on task. The second attempted a more specific examination of color and time on task. Expected light level, time on task and chromatic aberration effects were evident. Declining light levels and extended time on task produced expected decrements in accommodation. Ambient color environments produced predictable differential accommodation. No statistically significant differences were revealed to support the possibility of color mediated differential regression to resting point of accommodation. Keywords: Visual perception, Visual acuity, Visual accommodation. (aw)