portion 333 intermediate portion 333 has a x shaped cross section the top portion of the intermediate plunger portion 333 has a flat planar section 339 and a plurality of resilient fingers 334 extending outwardly from the planar member 339 when the injector assembly is initially assembled the plunger is inserted through a hole 342 extending through the upper portion of ring member 310 and then into the body portion 315 in their unflexed state fingers 334 extend a distance outwardly from portion 333 greater than the diameter of hole 342 thus as they engage hole 342 the fingers are compressed inwardly once they clear the hole they return to their normal state and prohibit the plunger from being withdrawn from the body portion of the assembly fingers 334 are compressed inwardly as they enter the upper portion of casing 315 as shown in fig1 the upper portion of the plunger 335 has a x shaped cross section and terminates in a circular disk portion 336 which is adapted to be engaged by the thumb of the surgeon when the top portion 336 of the plunger initially engages ring 310 the tip 337 is positioned at the entrance of nozzle 312 as shown in fig1 as the tip portion 337 passes through the outlet of nozzle 312 a shoulder portion 319 of the plunger abuts a shoulder 318 within casing 315 as shown in fig1 this prevents further movement of the plunger within the eye the arrangement of fig1 15 allows the surgeon to inject the lens into the lens capsule preferably using a pulsating technique this technique involves the surgeon intermittently depressing the.