A surgical instrument for ophthalmic use comprises a rigid outer tubular member and a rigid inner tubular member which is axially slidable within the outer tubular member. The outer tubular member has a closed distal end which is beveled at an oblique angle with respect to the longitudinal axis of the...http://www.google.com.au/patents/US4530356?utm_source=gb-gplus-sharePatent US4530356 - Ophthalmic surgical instrument with beveled tip
