**3.6 Effect of resolution of display type to visual symptoms**

Table 6 shows the result of experiment on the effect of display resolution on the subjects. Three level of resolution were investigated for both the liquid crystal display (LCD) and cathode ray tube (CRT) displays, which are high resolution, medium resolution and low resolution. The result of statistical binomial test at 5% significant level found that the overall level of resolution using either the LCD or CRT displays causes eyestrain symptoms to the users with more than 56% experiencing eyestrain. Others effect such as dry and irritated eyes symptoms were experienced by 56% of users when interacting with medium and low resolution CRT display.
