!%The Optical Systems Div. of Zygo Corp.%! has been awarded a $4 million order from a major medical device manufacturer to produce high-precision assemblies used in an ophthalmic medical device. Zygo will produce the devices at its Electro-Optics Group in Tucson, Ariz., which specializes in metrology-based manufacturing and precision active assembly of optical systems for the life sciences, semiconductor and defense markets. Based in Middlefield, Conn., Zygo also is a supplier of optical metrology instruments.