1. The author is at Casey Eye Institute, Oregon Health Sciences University, 3375 S.W. Terwilliger Boulevard, Portland, OR 97201, USA, and is a Senior Scholar supported by Research to Prevent Blindness. The author has provided medico-legal advice for attorneys representing Baxter Healthcare, Bristol-Myers Squibb, Dow Chemical, Minnesota Mining & Manufacturing (3M), and plaintiffs in silicone breast implant litigation. The author has testified in court proceedings on behalf of manufacturers.