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.

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