1. Cortex at the 12 o'clock position and the role of peripheral iris opening;Alpar;Ophthalmic Surg.,1991
2. Irrigation/aspiration hand-piece with changeable tips for cortex removal in small incision phacoemulsification;Hagan;J. Cataract Refract. Surg.,1992
3. Instrumentation for superior cortex removal;Horiguchi;Arch. Ophthalmol.,1991
4. A new cannula for removal of 12 o'clock cortex through a sideport corneal incision;Hagan;Ophthalmic Surg.,1992
5. Cortical cleaving hydrodissection;Fine;J. Cataract Refract. Surg.,1992