Have a frame made of zyl (plastic) holds lenses via nylon cord. Ends of cord are flattened to keep them from going through the holes. Tried to heat end of cord to form a ball to hold the cord. Ball is not acceptable as it will hit the nose when wearing. How can I form the flat "disc" at the end of the cord? Seen this before? Have two and would be oh so appreciative for a suggestion.
Mike
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