Several studies have been conducted to evaluate visual fatigue
by using subjective ratings and physiological evaluation methods.
and Kuze et al., which made use of the Simulator Sickness Questionnaire (SSQ), which took a substantially longer time to fill.10,12 The data provided through the questionnaire sought to link 3-D viewing with associated symptoms of visual fatigue
Jonas, "Visual fatigue
and discomfort after stereoscopic display viewing," Acta Ophthalmologica, vol.
Employees are entitled by law to request further eye tests at regular intervals if DSE work is considered to cause them visual fatigue
. It is generally recommended that most people should get their eyes tested every two years but the frequency should be determined by clinical judgment and may depend on an individual's age and state of vision.
On screen work and visual fatigue
and its course after ophthalmologic management.
From the above mentioned it is important to further investigate physiological mechanisms of visual fatigue
and working productivity in PC users.
who showed that eye strain and visual fatigue
were the most severe and frequently reported symptoms among computer users.
Beyond physical fatigue, inspectors experience visual fatigue
and discomfort that leads to increased error rates.
In the present study, illumination intensity was measured by luxmeter (Hugner model), visual fatigue
was determined by eye fatigue questionnaire that is comprising 15 questions, and answers have been designed on 0-10 Likert range.
Despite the strange new perspective on the world, the device does not cause any nausea, motion sickness or visual fatigue
, its creators claim in a paper they presented at the Virtual Reality Software and Technology conference in Toronto, Canada, this week.
high definition, precise control of the shooting conditions), they may also cause visual fatigue
over different groups of people .
George Wald, Ph.D., the 1967 Nobel Prize winner for "discoveries in the physiological and chemical visual process in the eye" (he identified Vitamin A in the retina), wrote an article in Scientific American entitled "Life and Light" where he disproved other physiologists' definition of visual fatigue
as "a deterioration in performance due to physical deprivation." Wald performed tests in his Visual Fatigue
Lab at Harvard University and discovered that the closest causal relation to visual fatigue
was not physical deprivation but simply "boredom." He proceeded to close down the lab.