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Effects of a visual task with cognitive demand on dynamic and steady‐state accommodation
Author(s) -
Iwasaki Tsuneto
Publication year - 1993
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1993.tb00470.x
Subject(s) - accommodation , task (project management) , psychology , cognition , audiology , steady state (chemistry) , physical medicine and rehabilitation , cognitive psychology , medicine , neuroscience , engineering , chemistry , systems engineering
Dynamic accommodative response before and after, and steady‐state accommodation during, a visual task were measured using an infrared optometer to investigate the effects of psychological stress on accommodative facility. Increase in the post‐task dynamic accommodation response time (for a near‐to‐far condition) was greater for a group of subjects given a mental task at a higher presentation speed. In addition the steady‐state accommodation showed an inward shift under a closed‐loop condition which was enhanced when computation time was decreased. However, an inward shift was not evident when the performance level of subjects increased following training. The relationship between psychological stress. cognitive demand and accommodative function is discussed.