TY  - JOUR
PY  - 2010//
TI  - Comparison of the visual function index to the snellen visual acuity test in predicting older adult self-restricted driving
JO  - Traffic injury prevention
A1  - Vaca, Federico E.
A1  - Fox, J. C.
A1  - Chakravarthy, Bharath
A1  - Ahmed, Suleman S.
A1  - Carr, Erin M.
A1  - Anderson, Craig Lewis
A1  - Grotsky, Thomas Aaron
A1  - Patel, Bhakti Harishchandra
A1  - Lotfipour, Shahram
SP  - 503
EP  - 507
VL  - 11
IS  - 5
N2  - Objective: In this observational study, a modified version of the Visual Function Index (VF-14) and the Snellen Visual Acuity Test were compared in how well they correlated with self-restricted driving habits in older adults. The VF-14 was originally designed to assess vision in cataract patients; however, in this study, a modified version (mVF-14) was evaluated as a tool for predicting self-restricted driving in older drivers. Methods: During a 3-month period, 151 drivers over the age of 65 were screened at the local senior center. In addition to the Snellen Visual Acuity Test and mVF-14, each participant was given a questionnaire about their driving habits, previously used in self-restriction studies. Results: Out of 151 total participants, 134 were included and 7 nondrivers and 10 subjects who did not complete all questionnaires were excluded. One hundred one participants exhibited normal visual acuity of 20/40 or better (75%), and 110 scored over 90 on the mVF-14 (82%). Spearman's rank sum correlation coefficient was used to analyze the data and showed significant negative correlation of the mVF-14 and Snellen with self-restricted driving. Individuals with normal vision (20/40 or better on the Snellen eye test) had both high and low mVF-14 scores. Conclusions: The study shows that poor vision, as indicated by the Snellen scale and low mVF-14 scores, correlates to self-imposed driving limitations. The mVF-14 showed further distinctions of self-restriction between individuals in the same Snellen Visual Acuity category. Therefore, using the mVF-14 in addition to the Snellen Visual Acuity Test can be helpful to further differentiate visual ability within older drivers who appear to have normal vision.<p />  <p>Language: en</p>
LA  - en
SN  - 1538-9588
UR  - http://dx.doi.org/10.1080/15389588.2010.488494
ID  - ref1
ER  -