Purpose: Glaucoma is a progressive optic neuropathy leading to loss of visual function beginning with the peripheral visual field. One large population-based study found that individuals with visual impairment reported difficulties in performing most vision-dependent daily activities, including difficulty with driving. The objective of this retrospective cohort study was to investigate the driving habits of glaucoma patients and to determine the conformance of their visual acuity and visual fields with driving regulations.
Methods: The charts of 20 patients followed in the Ophthalmology Department of Foch Hospital, Suresnes, Paris, France, with open angle glaucoma (mean visual field mean deviation of the worse eye: -15.5 dB; range -1.97 to -27 dB) and still driving, were reviewed. Data collected included visual acuity, type of glaucoma, slit lamp and fundus examination, most recent standard automated perimetry, and binocular visual field test results. Each patient was asked if he or she still drove on highways, and if he or she still drove at night.
Results: The driving habits of glaucoma patients were analyzed, and visual acuity and binocular visual fields were compared to French and European legal driving criteria. Thirteen patients (65%) with glaucoma were still driving on highways, and five (25%) at night. Seven patients (35%) were below French legal minimum visual acuity or visual field criteria.
Conclusion: Glaucoma patients appear to self-regulate their driving habits by avoiding potentially difficult driving situations. Further studies with larger sample size are necessary to determine relationships between severity of visual impairment, severity of visual field defects, and the cessation of driving.
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