[Are cross-eyed persons worse drivers? The effect of stereoscopic disparity on driving skills].

Abstract:

BACKGROUND:The motorist obtains about 90% of the information required to drive a vehicle from the sense of vision. In road traffic, various situations with respect to size, distance, and position have to be evaluated at different speeds. Does depth perception based on disparity play an essential role in these situations? METHODS:Each of ten subjects with defective stereopsis due to strabismus was compared with an age matched healthy control, who was also matched in yearly mileage, type of vehicle and duration of driving experience. After ophthalmological examination including stereotests for both distance and near, all subjects performed the following driving tests: (1) Stopping as close as possible in front of an obstacle, (2) reversing into a parking position, (3) driving a slalom parcours at the speed of 40 km/h, (4) estimating the relative position of two cars within a limited time while approaching them with 40 km/h. All tests were performed both under monocular (the non-leading eye covered) and binocular conditions. The sequence of the tests was randomized in order to minimize training effects. RESULTS:Comparing the driving performance of both groups, the controls performed significantly better (p < 0.01; ANOVA) only in the "slalom task". In "estimation of position" the controls performed significantly worse (p < 0.01; ANOVA) compared to their counterparts with defective stereopsis. A significant difference between the monocular and binocular performance was found only in the "stopping task", exclusively for the group of normals, benefitting from the binocular performance (p < 0.05; ANOVA). CONCLUSION:Stereopsis improves the driving performance only in dynamic situations at intermediate distances.

journal_name

Klin Monbl Augenheilkd

authors

Bauer A,Kolling G,Dietz K,Zrenner E,Schiefer U

doi

10.1055/s-2000-10343

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

183-9

issue

3

eissn

0023-2165

issn

1439-3999

journal_volume

217

pub_type

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