Pursuit Tracking Performance With and Without a Fixed Aiming Point in the Presence of Laser Ocular Filters

摘要

Visual cues such as borders are important to a pursuit tracking task. Four protective materials were evaluated in the BLASER tracking simulator using 2 target vehicles; one vehicle had a high contrast aiming patch, the other did not. The purpose of this study was to determine possible performance differences attributable to the use of two different target vehicles while using laser ocular protective materials. Nine volunteers used an optical tracking device in the BLASER tracking simulator to track targets moving at a constant angular velocity of 5 mrad/sec under both bright and dawn/dusk ambient light conditions. The dawn/dusk ambient light condition was created by inserting a 2.7 OD neutral density filter in the optical pathway of the tracking device. Each volunteer completed five trials under each possible combination of ambient light level, absence or presence of the target patch, and laser filter condition. Analysis of Variance for the horizontal standard deviation scores revealed highly statistically significant main effects for light level and filter condition, as well as a light level x filter interaction. (RH)