definiens: shall mean a viscoelastic solution ( i. e., an aqueous polymeric solution with viscous and elastic properties that are used as surgical aids within the Surgical Ophthalmic Field ) containing only those ingredients set forth on Exhibit A-2 ( but no additional viscoelastic agents ) and having all of the following properties : ( i ) afl aYerage molecular weiglH fur Sodium HyalHFoflate of 1,QQQ, QQQ Daltsfls ts 2,9 ( } ( }, ( } ( } ( } DaltoRs, ( ii ) a viscosity ( 1 see - J. @ 25 ° C ) of 47,2 ( } ( } cP to 63,9 ( } ( } sP, and ( iii ) a eOReentmtiofl of SodiHm HyaluroRate of 14 mg / mL ts 1 g mg / mL