Influence of the job profile of a healthy population on visual working distances
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First Author: F.Soler SPAIN
Co Author(s): D. Piñero Llorens A. Sánchez-García A. Molina-Martin D. de Fez V. Díaz N. López-Gil
To analyze and characterize the visual work and mobile phone usage distance patterns in a large healthy population and how they can influence on the selection of a specific design of multifocal IOL
Fundación Dr Soler de la Comunidad Valenciana, Elche, Alicante, Spain.
Transversal study resulting from a screening campaign evaluating the visual status of professionals working in different companies. A total of 454 patients were revised with a mean age of 41.5 years, ranging from 20 to 64 years. A battery of screening tests was performed to all participants in a single session at the working environment of each of them, including measurement of the working distance (WD), arm length, and mobile phone usage distances (MPUD).
WD was significantly longer than MPUD (72.36±88.32 vs. 31.98±6.32 cm, p<0.001). Differences between WD and arm length (74.23±4.81 cm) did not reach statistical significance (p=0.792), but the difference with MPUD did reach it (p<0.001). WD was significantly longer in males than females (p<0.001), but no differences according to gender were found in MPUD (p=0.116). Likewise, no significant differences in WD and MPUD were found between individuals with exo and esophoria (p=0.353). Individuals working more than 2 hours with computers and/or digital devices showed a significantly shorter WD (93.82±148.61 vs. 61.21±12.35 cm, p<0.001), but no differences were observed in MPUD (p=0.527).
The distance of use of the mobile phone is shorter than the WD. Likewise, WD varies significantly between individuals and professions, with shorter distances for users of computers/digital devices. This variability should be considered when implanting multifocal intraocular lenses to optimize the result and adapt the best design to the specific needs of the patient.