Uveitis and intraocular lenses.

Discs of polymethylmethacrylate containing 0-5 per cent. unpolymerized monomer were heated to create increasing concentrations of unpolymerized fragments up to 3-7 per cent. These fragments were then studied in tissue culture and in the anterior chambers of rabbits. No toxicity was evident in culture nor was there a difference in anterior segment response to the discs containing various concentrations of monomer. It would appear that the inflammatory response after implantation is predominantly mechanical in origin.