Figure 1. Simulation goggles and simulated visual field.

“Simulated patients” wore goggles (top left) to simulate reduced visual function to the vision of 20/600. Representative results of visual field analysis (Humphrey Field Analyzer 30-2 program; Carl Zeiss, Jena, Germany) with goggles restricting the visual field to 3° show a successful simulation effect (bottom left and center). Motion analyses were performed using a motion capture system comprising eight cameras and a force plate (right).