Computer Vision Syndrome, Video Display Terminal Workers
Conditions
Brief summary
Video display terminal users frequently refer computer-related visual and ocular symptoms, that are the most frequently occurring health problems among such these subjects. The Italian law has established an eye examination to assess ocular status (D.Lgs 81/08 ex law 626/96) in VDT workers: subjects are evaluated by clinical signs and symptoms. The availability of a validated questionnaire could be very useful to diagnose visual disturbances and to follow them during follow-up examinations in 2014, a Spanish group has developed and validated a questionnaire for the assessment of visual and ocular symptoms in VDT workers. Aim of the present study is to make available to Italian health professionals a new instrument to assess asthenopic symptoms, taking into account the patient's perspective.
Interventions
DIAGNOSTIC_TESTcomputer vision symptom scale (CVSS) questionnaire
Subjects working at VDT for \>20 hours a week and accessing to the Eye Clinic in order to complete an ocular examination and subjects working at the Foundation accessing to the Eye Clinic in order to complete an ocular status evaluation according to Italian Law 81/08 will be asked to self-complete the questionnaire in presence of the attending junior ophthalmologists prior to the visit with the Ophthalmologist, to avoid interference with visit results (communication of bad/good news)
Sponsors
Fondazione IRCCS Policlinico San Matteo di Pavia
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* VDT workers as defined by the Italian law (\>20 hours a week on PC); in the control group patients no VDT workers. * VDT workers at the Foundation or VDT accessing to the general service of the Clinic for a routine visit (VDT group) * patients, not working at VDT, accessing to the general service of the eye clinic to perform a routine visit will be asked to participate the study (control group) * no ocular surgery in the preceding 6 months * written consent to participate to study procedures and personal data utilization in an encoded form
Exclusion criteria
* ocular surgery in the preceding 6 months * patients unable to respond to questionnaire
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| To assess reliability (Cronbach alpha) of the CVSS | one year | Cronbach alpha |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| To assess: -item internal consistency -equality of item-scale correlations -item discriminant validity -temporal stability -discriminating ability (between VDT and non-VDT workers) -external validity | one year | statistical examinations |
Outcome results
None listed