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[Member] Single-use sphere lens Single Use Sphere Lens [Member] Single Use Sphere Lens [Member] Entity Current Reporting Status Entity Current Reporting Status Earnings per share (Note 7): Earnings Per Share, Basic and Diluted [Abstract] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents United States UNITED STATES Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Fair value of contingent consideration Business Combination And Asset Acquisitions, Contingent Consideration, Liability Business Combination And Asset Acquisitions, Contingent Consideration, 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[Member]