tailieunhanh - MONOCULAR IMPAIRMENT IN VIDEO DISPLAY TERMINAL OPERATORS A Case Series

You can split a large group into small teams each responsible for one aspect of the villa – the buildings, the roofs, the courtyard. To extend the activity, include cut-away rooms showing internal details such as mosaics and wall paintings. You can spread this activity over more than one session by making all the parts in session one and building in session two. Further sessions could include making mosaic floor (using the Make a Marvellous Mosaic pack) or making mini Romans to live in the villa - you can use Eric for inspiration. Visiting a Roman site can be a great way to inspire your group. Some sites even offer. | MONOCULAR Impairment in video display terminal OPERATORS A Case Series Jose Luis R. Villa . Nadia Rodriguez Diplomature Optic and Optometry Iberia Airlines Health Service Madrid Spain Abstract This study examined the clinicalfindings of visual display terminal VDT users who presented with monocular symptoms. The sample consisted of 35 people performing sustained work at VDTs. Each subject underwent an evaluation that included visual acuities determination of refractive status ocular motor testing the stability of fixation degree of suppressions of simultaneous binocular perception and ocular health status. These findings were compared to a control group of 100 subjects who did not habitually use a VDT. Significant signs of unstable fixation suppression were found with symptomatic subjects as compared to the controls. We also found initial visual acuity differences between the two eyes of the VDT user group but no significant refractive differences. Phoria measures were not significantly different between the two groups but binocular fixation stability and suppression significantly predicted symptoms. The ergonomic analysis indicated that the various positionings of the VDT keyboard and text could be a cause of the anomalous binocular responses. Symptoms and simultaneous perception measures reduced or even returned to normal when a recommended workstation layout was followed. Key Words ergonomics fixation stability Maddox Wing Test monocular symptoms phoria refractive status simultaneous perception suppression synoptophore visual acuity visual display terminal VDT INTRODUCTION Computer science and the corresponding use of video display terminals VDT is a present reality. Although it is hard to establish an accurate number of VDT users there are reported to be millions of web pages and over 700 million people are using the People who frequently use computer screens have been shown to exhibit visual Studies have investigated the occurrence .