The Italian Version of the Computer-Vision Symptom Scale Questionnaire: Translation, Validation and Reliability.

Study Overview
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Brief Summary
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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.

Official Title
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The Italian Version of the Computer-Vision Symptom Scale Questionnaire: Translation, Validation and Reliability.

Conditions
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Video Display Terminal Workers, Computer Vision Syndrome

Intervention / Treatment
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* Diagnostic Test: computer vision symptom scale (CVSS) questionnaire


Participation Criteria
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Eligibility Criteria
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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

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: completion of the computer vision symptom scale questionnaire, italian version<br>video display terminal (VDT) workers completed the questionnaire | Diagnostic Test: computer vision symptom scale (CVSS) questionnaire<br>* 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)<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To assess reliability (Cronbach alpha) of the CVSS | Cronbach alpha | one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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 | statistical examinations | one year |