Showing papers on "Haptic technology published in 1986"

Intraocular lens structure with polyimide haptic portion and methods for fabrication

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. Accordingly, the unique structures and methods provide haptic portions of an infinite variety of engineered shapes which, together with the optical zone portion, are autoclavable and provide a comfortable fit for the eye. The novel lens structure combination permits a wide variety of haptic portions and optical zone portions to be conveniently assembled, thereby providing a lens structure combination which possesses appropriate haptic configuration and optical characteristics custom-fitted to a patient's individual requirements.

Eliminating the Haptic Oblique Effect: Influence of Scanning Incongruity and Prior Knowledge of the Standards:

Abstract: Although the oblique effect has been conceptualized as a purely visual phenomenon, recent studies report its occurrence in a haptic matching task and present the hypothesis that differences in haptic orientational sensitivity might be responsible for the results. The possibility that procedural variables could be responsible was investigated. Specifically, the effect of prior knowledge of the stimulus orientation standards and of use of bilateral haptic exploration of standard and comparison orientations was examined. The results indicate that the reported oblique effect is reduced either when subjects are not informed which orientations will be tested, or when a unilateral matching procedure instead of a bilateral one is used. When both conditions are combined, the haptic oblique effect is eliminated. It is concluded that this particular manifestation of the oblique effect is not related to haptic sensitivity, but stems from (i) the use of well-established imagery as referent for a match (imagery for obl...

Intraocular lens having unitary integral haptic means

Abstract: An improved, easily installable intraocular lens is provided which makes use of a single, specially configured fixation haptic so as to ease the rotational installation of the lens in the restricted area of the patient's eye, while assuring that the haptic remains in place during use to avoid lens tilting. In preferred forms, the lens includes a central optic with a single haptic secured thereto. Both ends of the haptic are secured to the optic at circumferentially spaced points, and the haptic is oriented in an arcuate fashion about a substantially portion of the periphery of the optic and includes a hairpin-type U-shaped section between the haptic ends. By virtue of this design, the surgeon can initially place the U-shaped leading haptic section within a desired eye chamber or bag and rotate the lens to readily place the entire device therein.

Tactile information processing

Abstract: In this chapter we present an introduction to tactile information processing. We begin by describing the technology and presenting some early work; we then discuss in detail our current work in building a robot haptics system; finally, we introduce the concept of shape from touch and briefly describe two systems which incorporate touch with vision to do object recognition.