• Cat #20
    tök jó hogy tele van rakva linkkel a cikk, és senki nem kattint rájuk:

    This study was performed at four institutions with large workforces (>5000 employees) in Japan, and most workers were involved in the electronics and steel industries. We assumed that workers in these institutions exhibited a representative work style for the past several decades in Japan. Two companies were located in metropolitan areas and two were in the suburbs. To randomly choose participants, they were selected according to their date of birth at three centres and according to their company ID number at one centre.

    In addition, all participants completed a self administered questionnaire about their private life and working style, including a history of ocular disease (retinal detachment, diabetic retinopathy, cataract, ocular hypertension, and glaucoma), a family history of glaucoma, symptoms of migraine, smoking habits, alcohol consumption, and computer use. Information concerning computer use included the subject’s history of computer use, the mean daily time (both privately and at work) spent using computers for the past five years, the present level of use.