Abstract: A method and apparatus for adjusting the interpupillary distance of viewing glasses includes pivotally connected right and left lens holders which fit into right and left eye openings. The edges of the lens holders rest upon the inner surface of the eye openings. As the pivot axis of the right and left lens holders is vertically moved up or down along a slotted throughway in the bridge of the glasses, the lens holders move horizontally inwardly or outwardly to adjust the interpupillary distance. In a preferred embodiment of the invention, the center of the lenses remain at a constant height as they move inwardly and outwardly.

Abstract: A filter dispenser is disclosed. The dispenser comprises a filter holder for horizontally holding a multiplicity of nested filters, an extractor positioned above the filter holder having a tacky material on its lower surface, and a resilient bridge connecting the extractor to the filter holder, whereby when the extractor is pressed downward the resilient bridge is bent until the tacky material contacts the uppermost of the filters, and, when released, returns to its original position with the uppermost filter attached to the tacky material. Also disclosed is a method of dispensing filters using the filter dispenser. The extractor is pressed downward until the tacky material contacts the uppermost filter in the stack. The extractor is permitted to return to its original position with the uppermost filter adhering to the tacky material and the uppermost filter is removed from the tacky material.