Effects of virtual lighting on visual performance and eye fatigue

Abstract

This study is designed to determine whether differences in eye fatigue and visual performance can be shown under varying virtual industrial lighting conditions. It is based on the results of studies of more traditional video display terminal (VDT) tasks reported in the literature. One experiment was designed to determine if the effects of virtual lighting on eye fatigue and visual performance in a simulated virtual industrial environment are similar to some other VDT tasks with varying luminance contrast. Results of a test of 20 participants in a vigilance task show that there is a significant difference in performance and eye fatigue in the virtual environment with varying virtual light conditions. These results may help designers see that performance in some virtual "lighting" conditions, for some tasks, is consistent with that in the real. However, due to the difficulties of determining the appropriate virtual objects to be considered for the luminance measures, additional research is needed to be able to generalize the results to other industrial training scenarios. A second experiment was intended to test for the luminance decrement in a VDT that was shown in recent literature. The results would have potential implications for the experiment that included a vigilance task. However, the results showed that the luminance decrement demonstrated in recent literature did not occur. These results suggest that the equipment used in the present experiments should not cause difficulty in interpreting the results of the vigilance task.

The Relationship between Thermal Comfort and Light Intensity with Sleep Quality and Eye Tiredness in Shift Work Nurses

“…When people in workplace face inadequate level of light intensity, they try to make up this defect by pressuring on their eye muscles and continue to their activities and complete their tasks. This leads to eye tiredness and frequent headaches which can be a negative effective factor on sleep quality itself [12]. This defect can be fixed by improving the light intensity of the environment.…”

“…The results of a study showed that the level of lighting affected practitioners' performance and their eye fatigue [12]. In a research on improving nurse performance with appropriate design of light, which was done by Kamalii and Abbas in 2011, it was found that with a appropriate lighting design, the performance of nurses was improved, and their fault rate was diminished [13].…”

Real-Time Occupational Stress and Fatigue Measurement in Medical Imaging Practice

“…Some of the perceivable symptoms of visual fatigue are blurred vision, ocular pain, ocular swelling, headaches, and dry eyes [16]. Viewing distance [12], ambient lighting [17,18], display resolution [19], mental workload [20], glare [21,22], viewing angle [23,24], and length of continuous viewing time [6] all have been shown to increase visual fatigue with video display terminal use. Sanchez-Roman et al compared two groups of workers, one using computers and the other not [25] and found that 4 h at the computer was sufficient to produce asthenopia.…”

Perception of safe robot speed in virtual and real industrial environments

“…All the participants had to determine the acceptability level for each initial experimental condition. The magnitude estimation was used to examine their perceived level of acceptability (Duffy & Chan, 2002). To make their scaling judgements consistent between subjects, the six steps transformation of modulus equalization proposed by Snow and Williges (1998) was applied to the data.…”

“…The results have implications for both services and manufacturing industries (Duffy & Salvendy, 2000) where full and hybrid automation are an integral part of workplace design and where perception has safety implications (Duffy, Wu, & Ng, 2003) and performance implications (Duffy & Chan, 2002). Training can impact recognition of the hazardous conditions (Duffy, 2003;Duffy, Ng, & Ramakrishnan, 2004).…”