CRTs pose health problems for operators.
D001248:Asthenopia / Q000209:etiology*; D001610:Beta Particles; D003116:Color; D003201:Computers; D003626:Data Display; D004779:Environment Design; D006804:Ergonomics; D005139:Eyeglasses; D005221:Fatigue / Q000209:etiology*; D006801:Humans; D009784:Occupational Diseases / Q000209:etiology*; D010561:Personnel Staffing and Scheduling; D011187:Posture