Abstract: Aspiration tubing for use in a phacoemulsification system is provided having a modified lumen that enhances resistance of fluid flow through the lumen to reduce post-occlusion surge, the modification comprising recesses or protuberances formed in the interior surface of the lumen, a freely-moving object disposed in the flow path of the lumen, or one or more bends.

Abstract: Aspiration tubing for use in a phacoemulsification system is provided having a modified lumen that enhances resistance of fluid flow through the lumen to reduce post-occlusion surge, the modification comprising recesses or protuberances formed in the interior surface of the lumen, a freely-moving object disposed in the flow path of the lumen, or one or more bends.

Abstract: A phaco-emulsification needle is provided for use with a plastic or elastomeric sleeve, the needle having a mid-region portion defining a plurality of outwardly extending projections forming longitudinally-oriented grooves that provide adequate irrigant flow rates to the anterior chamber of the eye, even when the entry wound compresses the sleeve against the outer surface of the needle, thereby reducing the risk of collapse of the anterior chamber due to inadequate irrigant flow and reducing the risk of excessive heat transmission to the entry wound.

Abstract: A phaco-emulsification needle is provided for use with a plastic or elastomeric sleeve, the needle having a mid-region portion defining a plurality of outwardly extending projections forming longitudinally-oriented grooves that provide adequate irrigant flow rates to the anterior chamber of the eye, even when the entry wound compresses the sleeve against the outer surface of the needle, thereby reducing the risk of collapse of the anterior chamber due to inadequate irrigant flow and reducing the risk of excessive heat transmission to the entry wound.

Abstract: A phaco-emulsification needle is provided for use with a plastic or elastomeric sleeve, the needle having a mid-region portion defining a plurality of outwardly extending projections forming longitudinally-oriented grooves that provide adequate irrigant flow rates to the anterior chamber of the eye, even when the entry wound compresses the sleeve against the outer surface of the needle, thereby reducing the risk of collapse of the anterior chamber due to inadequate irrigant flow and reducing the risk of excessive heat transmission to the entry wound.

Abstract: A biocompatible corneal inlay ring apparatus for altering the curvature of the central optic zone of the cornea of the eye without intrusion into this optic zone, comprising a continuous ring of a fixed diameter greater than that of the optic zone, of a thickness and geometry such that the curvature of the central optic zone is flattened to an extent appropriate to the refractive correction desired, and of a composition having a refractive index within about 2.0% of that of the corneal tissue.

Abstract: A low or high refractive index corneal inlay optical lens adapted to be inserted singly or multiply between the layers of a cornea to correct refractive errors in eyesight, wherein the implanted lens is a solid transparent uncoated lens having no apertures therethrough, of a diameter less than that of the optic zone of the eye under normal light or bright light conditions, such that the movement of fluids, nutrients and gases throughout the corneal layers is unimpeded, and wherein the composition of the lens or lenses relative to that of the surrounding stromal tissue are such that multiple refractive indices may be created and multiple focal corrections are possible.

Abstract: A toroidal lens (10) or a plurality of such lenses attached to a handle (14) for use as or in a keratoscope (12). If a plurality of lenses are employed, they are arranged either in different planes parallel to each other or concentrically in a single plane with varying degrees of ellipticity.

Abstract: Bicomposite intraocular lenses and methods for their manufacture are disclosed. Bicomposite, hydrogel intraocular lenses with one or more haptic portions having a lower water content than the corresponding optic portions, and methods for their manufacture are disclosed. The bicomposite lenses are manufactured by (i) preparing a bicomposite button of hydrogel material containing one or more polymers or copolymers; (ii) lathing the button to produce a dehydrated intraocular lens with an optic and at least one haptic; and (iii) hydrating the lens.

Abstract: A low or high refractive index corneal inlay optical lens adapted to be inserted between the layers of a cornea to correct refractive errors in eyesight, wherein the implanted lens is of a size or configuration that permits unimpeded passage of nutrients and gases throughout the corneal layers and wherein the composition of the lens relative to that of the surrounding stromal tissue is such that multi-refractive indices may be created and multi-focal corrections are possible.

Abstract: Bicomposite, hydrogel intraocular lenses with one or more haptic portions having a lower water content than the corresponding optic portions, and methods for their manufacture are disclosed. The bicomposite lenses are manufactured by (i) preparing a bicomposite button of hydrogel material containing one or more polymers or copolymers; (ii) lathing the button to produce a dehydrated intraocular lens with an optic and at least one haptic; and (iii) hydrating the lens.

Abstract: A self-supporting intraocular lens formed entirely of a hydrogel and comprising a relatively thick central optic portion with relatively thin resilient flange portions.

Abstract: Disclosed is an apparatus and method for determining the symmetry of a light reflecting surface by superimposition and comparison of a first reflected image ("first image") upon the same image ("second image") which has been rotated, relative to the first image, in a common plane about a common axis; wherein such apparatus and method find preferred application in keratometers and keratometry.

Abstract: A method for reducing the size of hydrogel intraocular lenses by means of deswelling in hyperosmotic solutions (e.g., saturated sodium chloride solution) and a corresponding packaging arrangement are described. The deswelled, hydrogel lenses can be inserted through a much smaller surgical incision than fully hydrated lenses, yet retain all of the inherent advantages of hydrogel intraocular lenses (e.g., autoclavability). The lenses are rehydrated by the aqueous humor following implantation.

Abstract: An intraocular lens suitable for implantation in the human eye to replace the natural crystalline lens comprising a self-supporting lens formed entirely of a hydrogel and having a relatively thick optical portion with relatively thin resilient flange means extending away from the optical portion, the flange means being arranged to retain the implant in place in the eye.