Sign up & Download
Sign in

Eyestrain in VDU users: viewing distance and the resting position of ocular muscles.

by W Jaschinski-Kruza
Human factors ()

Abstract

Without fixation stimuli--for instance, in darkness--accommodation and convergence of the eyes reach an intermediate state that is relatively stable within a subject but which ranges from about 30 cm to infinity across subjects. This study investigated whether these oculomotor positions in darkness are related to visual strain. During work at a visual display unit (VDU), visual strain at a viewing distance of 50 cm was stronger than at 100 cm (with characters twice as large). The more distant the individual's dark convergence, the greater was the visual strain at the 50-cm viewing distance. When subjects were free to adjust the viewing distance to their comfort level, they chose distances between 51 and 99 cm (mean 74 cm) with characters 5 mm tall.

Cite this document (BETA)

Readership Statistics

9 Readers on Mendeley
by Discipline
 
 
 
by Academic Status
 
33% Ph.D. Student
 
22% Researcher (at a non-Academic Institution)
 
22% Assistant Professor
by Country
 
11% Malaysia
 
11% Portugal
 
11% France

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Already have an account? Sign in