Abstract: The invention provides improved intraocular lens structures for surgical placement in the eye, the unique structures comprise an optical zone portion substantially centrally disposed with an integral outer haptic portion. In one embodied form, the haptic portion is composed of materials having relatively high temperature resistance such as polyimide material, and can be fabricated in a wide variety of engineered configurations. In a presently preferred embodiment, the haptic portion includes an anchoring strut in an arcuate configuration having an oblique face directed to the center of the optical zone portion. The invention further provides methods for insert molding of haptic portions to optical zone portions of the lens structures without conventional secondary operations such as drilling sites in the optic for insertion and welding of haptics.

Abstract: A spring-loaded latching mechanism for a peristaltic pump that automatically sets and maintains a desired roller head tension. The spring-loaded latching mechanism includes a pair of counter-rotating latching cams positioned on opposite sides of a pump housing. Each latching cam has an indented or slotted portion for engaging a disposable tubing cassette. The disposable tubing cassette includes a length of flexible tubing supported by a circular race or channel. The latching cams are spring-loaded and, when the disposable tubing cassette is inserted into the pump housing, the latching cams urge the disposable cassette with its length of flexible tubing and circular race against a pump roller head to provide the desired roller head tension.