|Document ID (ISN)||53610|
|ISSN - Serial title
||0300-8134 - Journal of Human Ergology
|Convention or series no.
||Takeda T., Ístberg O., Fukui Y., Iida T.
||Dynamic accommodation measurements for objective assessment of eyestrain and visual fatigue
||Sep. 1988, Vol.17, No.1, p.21-35. Illus. 27 ref.
||A high-precision optometer system has been developed for dynamic measurement of the refractive power of the eye. With the use of individually chosen stimulus steps, a subject's accommodation performance can be unobtrusively assessed in about 3min. Three experiments using this assessment method are described: (1) visual search using a visual display terminal (VDT) and a matched hard copy display, (2) visual search using a VDT with 5 different cathode ray tube (CRT) phosphor colours, and (3) round-the-clock optometer testing with different lines of view. The results show that the new method is sensitive enough to detect both decreased accommodation performance in the course of a few hours of visual work and a circadian rhythm in baseline accommodation and dark focus. The method is thus a potentially useful tool in research on eyestrain and visual fatigue.
||eye examinations; ophthalmology; visual fatigue; visual function disorders
||visual displays; questionnaire survey; visual display terminals; refractive errors
||D - Periodical articles
|Broad subject area(s)
Diseases of the eye and vision damage