Davison, P.A. Primary Author mixed material bibliography TRRL 1980 id Indonesia

Chart

21 p.; fig.; tab. Data are presented at 25 sites using a British Standard test chart rather than a vision screening device. Assuming that the Department of Transport number plate test is equivalent to an acuity standard of between 6/12 and 6/9, it is estimated that between 1 percent and 3 percent of all drivers would fail the test at any given moment. Acuity was found to decline with age for drivers aged over 40 years. 5 percent and 10 percent respectively of drivers aged 65 over failed to meet the criteria of 6/12 and 6/9. A quater of all drivers tested were actually wearing spectacles or contact lenses prior to driving up to the testing station; only 15 of these drivers were wearing contact lenses. Qestionaire responses indicated that 64 percent of all drivers claimed to have had some form of eye test within the previous 3 years. The effects on drivers' acuity of type and use of optical prescription, and of length of time since last eye examination, are reported DRIVERS 625.7(047.31) Perpustakaan Direktorat Bina Teknik Jalan dan Jembatan Direktorat Jenderal Bina Marga - Kementerian Pekerjaan Umum (NPP: 3273244A00000001) 625.7(047.31) Dav s 0000001648 My Library 625.7(047.31) Dav s 1628 machine generated