Abstract: A head mounted display system for displaying image content to a user comprises at least one display configured to be worn by a user to present virtual content to first and second eyes of a user, one or more inwardly facing sensors or camera configured to monitor one or both of the users eye and processing electronics. This head mounted display system is configured such that virtual content activity can be initiated and/or driven from eye inputs such as gaze direction, eyelid motions (e.g., blinking), and/or other eye gestures.

Abstract: A glare source device, a glare test system and methods that assesses visual performance and discomfort under varying levels of glare under varying lighting conditions is provided.

Abstract: A head mounted display system for displaying image content to a user comprises at least one display configured to be worn by a user to present virtual content to first and second eyes of a user, one or more inwardly facing sensors or camera configured to monitor one or both of the users eye and processing electronics. This head mounted display system is configured such that virtual content activity can be initiated and/or driven from eye inputs such as gaze direction, eyelid motions (e.g., blinking), and/or other eye gestures.

Abstract: The present invention provides a long-bladed bolster 1, comprising a substantially planar cutting body 2 having one edge formed as a blade 3 of sufficient length so that the blade 3 is arranged in use to be positioned substantially centrally on a concrete masonry unit (CMU) to enable the block to be divided without the bolster 1 requiring repositioning, the bolster having a striking body on a second long edge of the cutting body opposite to the cutting blade configured to receive repeated blows from a striking implement in use and to transmit these through the cutting body to the blade and the bolster having an integral handle that extends from the cutting body and/or striking body of the bolster substantially centrally along the length of the cutting body 2 and substantially orthogonally to the plane thereof.

Abstract: A long-bladed bolster has a substantially planar cutting body having one edge formed as a blade of sufficient length so that the blade is arranged, in use, to be positioned substantially centrally on a Concrete masonry unit (CMU) to enable the block to be divided without the bolster requiring repositioning. The bolster, has a striking body on a second long edge of the cutting body, opposite to the cutting blade, configured to receive repeated blows from a striking implement in use and to transmit these blows through the cutting body to the blade. The bolster has an integral handle that extends from the cutting body and/or striking body of the bolster substantially centrally along the length of the cutting body and substantially orthogonally to the plane thereof.