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dc.contributor.supervisorBuckhurst, Hetal
dc.contributor.authorAbdul Rahim, Muhammad Afzam Shah Bin
dc.contributor.otherSchool of Health Professionsen_US
dc.date.accessioned2018-11-19T17:08:25Z
dc.date.issued2018
dc.identifier10457220en_US
dc.identifier.urihttp://hdl.handle.net/10026.1/12813
dc.description.abstract

The overarching theme of the thesis was to investigate the association between smart device use and computer vision syndrome. The initial study designed and developed the Open Field Tear film Analyser (OFTA) enabling a continuous, real-time assessment of the tear film and blink characteristics during smart device use. The monocular OFTA prototype was validated and showed good intra- and inter-observer repeatability relative to the Oculus Keratograph 5M and Bausch and Lomb one position keratometer. Subsequently, tear osmolarity following engagement with reading and gaming tasks on smart device and paper platforms was investigated. Discrete measures of osmolarity pre- and post-engagement with the tasks were obtained with the TearLab osmometer; osmolarity values differed between platforms when participants were engaged in a gaming task but no such difference was observed with the reading task. In addition, the influence of repeated measurements on tear osmolarity was also explored. To simulate the habitual binocular viewing conditions normally associated with smart device use, the binocular OFTA was developed. The device was used to assess the tear film and blink characteristics whilst engaging with reading and gaming tasks on smart device and paper platforms. The results revealed differences in blink characteristics and non-invasive tear break up time between the different platforms and tasks assessed. In addition, the thesis also reports on an investigation examining the real-time accommodative response to various targets displayed on smart devices using an open-field autorefractor with a Badal lens system adaptation. The results showed that accommodative latency, accommodative lag, mean velocity of accommodation, speed of disaccommodation and mean velocity of disaccommodation varied across the different platforms. Through the use of validated subjective questionnaires and smartphone apps, the relationship between duration of smartphone use and symptoms of dry eye were examined. The findings of this study demonstrated that longer duration of smartphone and personal computer use were associated with higher risk of dry eyes as indicated by subjective questionnaire outcomes.

en_US
dc.description.sponsorshipMinistry of Higher Education, Malaysiaen_US
dc.description.sponsorshipInternational Islamic University Malaysiaen_US
dc.language.isoen
dc.publisherUniversity of Plymouth
dc.subjectNon invasive tear break up timeen_US
dc.subjectBinocular Open Field Tear Film Analyzeren_US
dc.subjectTear osmolarityen_US
dc.subjectAccommodation responseen_US
dc.subjectSmartphone usage patternen_US
dc.subjectSmart devices and Computer Vision Syndromeen_US
dc.subject.classificationPhDen_US
dc.titleAn Investigation of Computer Vision Syndrome with Smart Devicesen_US
dc.typeThesis
plymouth.versionpublishableen_US
dc.identifier.doihttp://dx.doi.org/10.24382/898
dc.rights.embargodate2019-11-19T17:08:25Z
dc.rights.embargoperiod12 monthsen_US
dc.type.qualificationDoctorateen_US
rioxxterms.versionNA


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