Positional Variability Associated with the Wear of the Ballistic-Laser ProtectiveSpectacles (B-LPS)

摘要

The Ballistic-Laser Protective Spectacles (B-LPS) have been developed and fieldedto afford soldiers ocular protection against ballistic and laser threats in training and wartime environments. The one-size-fits-all approach assumes that the location and orientation of the spectacles relative to the eyes of the wearer fall within a tolerance range. In this study, photographs of 67 active duty soldiers wearing the B-LPS were analyzed by a computerized method to characterize to what extent the spectacles are worn in accordance with design criteria. Translational variability along three axes and rotational variability around two axes were measured. For most estimated parameters, the B-LPS were worn almost exactly according to design. However, the spectacles were found to rest approximately 8 millimeters further from the anterior aspect of the eye than