 The aim of this study is to investigate the impact of wearing visual display units VDU lenses versus progressive lenses on musculoskeletal and visual complaints in VDU workers with work related neck complaints. This will be evaluated by means of questionnaires Neck Disability Index and Visual Fatigue Questionnaire, muscle tone, elasticity and stiffness, pressure pain threshold and 2D video analysis of head posture during a VDU task. 