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Damien Paille, Sarah Marié, Amandine Debieuvre, Céline Benoit; Occupational Lenses respect natural posture when interacting in near vision with digital devices. Invest. Ophthalmol. Vis. Sci. 2017;58(8):4235.
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© ARVO (1962-2015); The Authors (2016-present)
In a previous work, we showed that the distance of use is smaller and the eye declination is higher when interacting with digital devices compared with traditional paper media (Paillé, Perrin, Debieuvre ARVO 2015). Our new range of occupational lenses (OcLs) Varilux® Digitime™ dedicated to the use of digital devices takes this result into account.The first part of the present study consists in an evaluation of satisfaction wearing Progressive Addition lenses (PALs) and OcLs. The second part aims to investigate head and eye posture recorded for intermediate and near vision tasks wearing OcLs, PALs and near vision prescription in Single Vision lenses (SVLs).
13 presbyopic PALs wearers were recruited. Following a satisfaction evaluation of their own PALs, they were fitted for two weeks with OcLs. After rating the new equipment, they performed postural measurements for intermediate and near vision tasks randomly wearing PALs, OcLs and SVLs, in different conditions. Postural data were recorded thanks to a VICON motion tracking system. Distance to the device, head pitch and eye declination were computed.
Satisfaction questionnaire: Subjects were usual wearers of last generation of PALs and most of them were very satisfied with their PALs. Combined with sample size, this explains why there is no statistical significant difference between PALs and OcLs. Nevertheless, for 6 subjects who are less satisfied with their PALs, OcLs produce better performance for near and intermediate tasks.Postural data: ANOVA showed significant differences (p<0.05) between the three equipments in terms of eye-device distance, head pitch and eye declination. We can consider that for a near vision task, the reference in terms of posture is the one measured with SVLs. Data measured with the OcLs show a clear tendency to being closer to the one measured with the SVLs compared to PALs in near and intermediate vision. Eye-device distance is shorter, head pitch is higher and eye declination smaller with SVLs and OcLs compared to PALs.
Results from the questionnaires showed that OcLs are relevant in intermediate and near tasks. Moreover, the posture adopted with OcLs is more natural when dealing with digital devices in near vision.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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