Bausch & Lomb invented the soft contact lens but failed to launch it because the firm did not want to lose the lucrative business of selling the drops that hard lenses require.

• 博士伦发明了软性隐形眼镜后并未将其推上市场，因为出售硬镜片所需的药水是个赚钱的生意，它不愿意失去这有利可图的业务。