I can't see the crack, but depending on how I hold it, it fills only 1/2 way, or all the way, so it must be somewhere along the upper edge. Must be like a hairline since I can't see it when I hold it up to a light. Thank God I can still wear it. Good luck w/ the insurance, keep at it. I only got back a total of a little over $500. - $200. of which was deductible for out of network doc.
Always good thoughts, Nancy