Allen & Overy (A&O) has advised pharma giant Novartis on its $28bn (£17.4bn) acquisition of a majority stake in Alcon, the world’s largest eye-care company, reports The Am Law Daily.

The deal is the second stage of a larger transaction originally struck in spring 2008, when Novartis purchased a 25% stake in Alcon for $10.4bn (£6.5bn), handing the company an option to purchase the 52% of the company owned by Nestle.