Document ID (ISN) | 53610 |
CIS number |
90-627 |
ISSN - Serial title |
0300-8134 - Journal of Human Ergology |
Year |
1988 |
Convention or series no. |
|
Author(s) |
Takeda T., Östberg O., Fukui Y., Iida T. |
Title |
Dynamic accommodation measurements for objective assessment of eyestrain and visual fatigue |
Bibliographic information |
Sep. 1988, Vol.17, No.1, p.21-35. Illus. 27 ref. |
Abstract |
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. |
Descriptors (primary) |
eye examinations; ophthalmology; visual fatigue; visual function disorders |
Descriptors (secondary) |
visual displays; questionnaire survey; visual display terminals; refractive errors |
Document type |
D - Periodical articles |
Subject(s) |
Occupational physiology
|
Broad subject area(s) |
Physical hazards
|
Browse category(ies) |
Fatigue Diseases of the eye and vision damage
|