On-Road Driving with Moderate Visual Field Loss
The study examined the relationship between visual field extent and driving performance in an open, on-road environment using a detailed scoring method that assessed the quality of specific skills for a range of maneuvers.
The purpose was to determine which maneuvers and skills should be included in future, larger scale investigations of the effect of peripheral field loss on driving performance.
28 current drivers (67±14 years) with restricted peripheral visual fields participated. Binocular visual field extent was quantified using Goldmann perimetry (V4e target).
Drivers with more restricted horizontal and vertical binocular field extents showed significantly (p < 0.05) poorer skills in speed matching when changing lanes, in maintaining lane position and keeping to the path of the curve when driving around curves, and received significantly (p < 0.05) poorer ratings for anticipatory skills.