| 摘要 |
A curved optical eye shield removably attached to a single set of arms that connect to an elastomerically operated tensioning system that is an integral part of ahead mount system. The eye shield rotates from a normal viewing position to an out of viewing position above the forehead. The rotation of the eye shield is initiated manually, but, the elastomerically operated tensioning system contemplates the rotation unassisted after the eye shield passes midway in its travel. The elastomerically operated tensioning system uses an H shaped tensor to apply clockwise tension to keep the eye shield held firmly in the viewing position, and when the eye if shield is manually lifted toward the out of viewing position above the forehead, tension is applied to the reverse or counter clockwise direction to keep the eye shield held firmly in the out of view position.
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