Advanced Medical Optics Inc. on Thursday offered to buy eye-care products rival Bausch &Lomb Inc. for $4.23 billion in cash and stock, topping a $3.67 billion cash bid by a private equity firm.

• 眼力健公司上周四宣布，欲以42．3亿美元收购竞争对手博士伦公司。这一价格超过此前一家私募股权基金公司提出的36．7亿美元收购报价。