Clinical Study

A Pilot Evaluation of On-Road Detection Performance by Drivers with Hemianopia Using Oblique Peripheral Prisms

Table 4

Participants’ experiences of using real prism glasses and clinical decision.

Hours per day, median (range)4.5 (1–12)
Moderately or very helpful for obstacle avoidance
when walking, % ( )
58 (7/12)
Moderately or very helpful for driving, % ( )75 (9/12)
Main ways in which helpful when driving, % ( )
 Seeing blindside traffic   30 (8/27)
 Provided warning 22 (6/27)
 Merging/intersections15 (4/27)
 More confident7 (2/27)
 Other19 (5/27)
 Unable to explain7 (2/27)
Difficulties using prisms when driving, % ( )
 None 50 (6/12)
 Initially (learn to use and interpret images) 25 (3/12)
 Busy places, rotaries17 (2/12)
 No response 8 (1/12)
Clinical decision % ( )
 Continue walking and driving83 (10/12)
 Continue walking only 8 (1/12)
 Discontinue use8 (1/12)

as participants made more than one response (open-ended question).