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> Abstract of "Aging, Visual Performance, and Eyestrain ..."
Title: Aging, Visual Performance, and Eyestrain in
Different Screen Technologies
Abstract The focus of the study was the analysis of visual performance of elder workers with different screen tech- nologies. Independent variables were display type (high quality CRT vs. TFT) and age of participants (20- 30, 40-50, 51-65 years of age). A continuous visual search task was used in the experiment. 24 participants (eight per group) performed in a 30-minute search task under both conditions. Search time and accuracy were also measured as dependent variables. Eye movements (fixation time and fixation frequency) were analysed and visual acuity as well as the critical flicker frequency (CFF) were determined. Moreover, participants rated their visual discomfort and gave a rating for display type preference and reading comfort. The results draw a clear picture: Visual performance was best with TFT displays and the oculomotor effort (eye strain) was less (shorter fixation times with less fixations) than with CRT displays. The visual discom- fort rating supported the findings and 18 out of 24 participants preferred the TFT Screen over the CRT. HoweveT, the superiority of TFT Screens in visual performance was most distinct in elder users (40-65 years) with a benefit in visual performance of up to 37% compared to CRTs. Thus, TFT displays can be highly recommended.
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