Abstract: A tissue barrier (410), for example of titanium alloy, for insertion into an incision in the sclera of the eye for the treatment of conditions such as presbyopia, comprises an elongate insert which is provided with a longitudinally extending flange (414, 416) at each end to prevent the barrier from being ejected from the incision. Each flange (414, 416) is preferably about half the height of the central portion (412) of the insert. Preferably, the flanges are of unequal length. The flanges may be circular or rectangular in cross-section. The central portion (412) may be thicker than the flanges transversely to the longitudinal axis of the insert. The outer ends of the flanges may be chamfered (418).

Abstract: An instrument (110) for rolling a thin ophthalmic lens and inserting the rolled lens into the eye comprises a body (112) in which a plunger (124) is slidable. A thin lens (156) is placed on a lens roller (130) which is slidable transversely of the instrument. The lens is rolled during the sliding movement into a tubular configuration. The rolled lens is then positioned in the instrument in a cylindrical cavity and ready for contact by a push-rod of the plunger (124) so that it is delivered from the instrument through a box in a tip portion (114) of the instrument.

Abstract: A caliper for ophthalmic surgery comprises a pair of arms which are relatively pivotable, with each arm terminating at one end in a tip, and with the tips being movable between closed and open positions upon pivotal movement of the arms. The amount of pivoting movement is controlled by an adjuster and a scale is provided to give an indication of the amount of tip separation. The tips of the arms are adapted to be insertable into an incision in eye tissue and to open the incision to a predetermined dimension to permit the insertion of an ocular lens. The tips may open the incision just by a stretching of the eye tissue, for subsequent insertion of the lens, or alternatively the tips may be provided with one or two diamond blades which open the incision by a cutting of the eye tissue.