Environmental Engineering Reference
In-Depth Information
3.2 Effect of virtual lighting to visual symptoms
The results of experiments on the effect of virtual lighting on visual symptoms are presented
in Table 2. The experiment was conducted for four level of brightness of virtual light from
darkest (10% level) to the brightest (100% level). The result of statistical binomial test at 5%
significant level exhibiting the different effects of visual symptoms experienced by users is
shown in Table 2. Eyestrain symptom was experienced by 83% of the users for all level of
brightness. Whereas 50% the users experienced symptoms of dry and irritated eyes at 10%
level of brightness and light sensitivity at 100% level of brightness. At the highest level of
brightness, dry and irritated eyes were experienced by 67% of the users.
3.3 Effect of field of view
Table 3 presents the result of experiment on the effect of field of view (FOV). There are two
types of FOV namely 120
0
and 85
0
FOV. Statistical binomial test at 5% significant level
shows the same result of visual symptoms effect experienced by users but at different
proportion especially the eyestrain and dry and irritated eyes symptoms. For 120 degree of
FOV, 63% of the users experienced dry and irritated eyes while only 50% of the users
experienced it for 85 degree of FOV. 75% of the users experienced eyestrain symptom at 85
0
of FOV and 50% of the users experienced it at 120
0
of FOV.
Observation
Proportion (%)
Exact Sig.
(1-tailed)
No. Degree of FOV
Symptoms
Decision
50
50
63
Eyestrain
Blurred Vision
Dry and Irritated Eyes
0.114
0.114
0.321
Effect
Effect
Effect
1.
FOV 120
0
75
50
50
Eyestrain
Blurred Vision
Dry and Irritated Eyes
0.633
0.114
0.114
Effect
Effect
Effect
2.
FOV 85
0
p
> 0.05 ; N = 8
Table 3. Result of Experiment and Binomial Test of Visual Symptoms of Field of View
3.4 Effect of flow rate of virtual object
Table 4 shows the result of experiments on the effect of flow rate (FR) of virtual object on
visual symptoms of the subjects. There are two types of flow rate studied, which are five
Observation
Proportion (%)
Exact Sig.
(1-tailed)
No. Flow Rate (FR)
Symptoms
Decision
Flow Rate 5
(FR5)
75
50
Eyestrain
Dry and Irritated Eyes
0.633
0.114
Effect
Effect
1.
75
50
50
Eyestrain
Blurred Vision
Dry and Irritated Eyes
0.633
0.114
0.114
Effect
Effect
Effect
Flow Rate10
(FR10)
2.
p
> 0.05 ; N = 8
Table 4. Result of Experiment and Binomial Test of Visual Symptoms of Flow Rate (FR) of
Virtual Object
