the carl zeiss company is the leading manufacturer of optical systems , industrial measurements,and medical devices .it 's competitor optovue introduced RTVue FD-OCT to the U.S market. RTVue is a hight-speed ,hight resolution OCT scanner used for retina imaging and analysis .one yaer after the introduction of RTVue FD-OCT ,optovue won the coveted medical design excellence award for this innovation technology.zeiss should use an attack strategy to defind its market share