Other

Surgidev Corporation

Dennis T Grendahl

William LeMaster

Anthony F Drake

Fritz D Harnsberger

Fernard J Masse

The disclosure relates to syringes which include a substantially rigid, hollow syringe body, a plunger and a flexible, finger-conformable grip, guard, collar or collet which are disposed about one end thereof.

Syringe having a flexible collar

Member of polymethylmethacrylate, polysulfone, polymer or a like material with a plurality of holes arranged in a predetermined, geometrical configuration. The holes are derived at through a procedure of repetitive drawing. Prior to the first drawing operation, each of the holes is filled with a material which is soluble to a certain chemical, yet drawable along with the base material. The member of material can be square, drawn to a reduced cross-sectional area as a square, the reduced cross-sectional members positioned with respect to each other and drawn again in a further operation, and repeated accordingly so that the cross-sectional area of each hole is reduced in proportion to each drawing step. Dependent upon the final drawing step, a subsequent member is provided which includes holes of a significantly reduced cross-sectional area. The member can be utilized as either a contact lens, an intracorneal inlay, an intraocular lens, a medical filter, or a like structure with small holes.

Process of making a member with holes

An implantable or contact hydrogel lens for replacement of a defective natural lens in an eye in which various portions of the lens have different powers and focal lengths to produce in-focus images on different portions of the retina of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Radially segemented zone of focus artificial hydrogel lens

An implantable or contact hydrogel lens for replacement of a defective natural lens in an eye in which various portions of the lens are laminated horizontally to have different powers to produce in-focus images on different portions of the retina of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Laminated zone of focus artificial hydrogel lens

An implantable or contact hydrogel lens for replacement of a defective natural lens in an eye in which various annular portions of the lens have different powers and focal lengths to produce in-focus images, on different portions of the retina, of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out of focus images and concentrate on the in focus image of the object selected by the brain for consideration.

Cylindrically segmented zone of focus artificial hydrogel lens

An implantable or contact hydrogel lens for replacement of a defective natural lens in an eye in which various portions of the lens have different powers and focal lengths to produce in-focus images on the retina, of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Multiple element zone of focus artificial hydrogel lens

An implantable or contact lens for replacement of a defective natural lens in an eye in which various portions of the lens are laminated horizontally to have different powers to produce in-focus images on different portions of the retina of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Laminated zone of focus artificial lens

An implantable or contact lens for replacement of a defective natural lens in an eye in which various portions of the lens have different powers and focal lenghts to produce in-focus images on different portions of the retina of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Radially segmented zone of focus artificial lens

An implantable or contact lens for replacement of a defective natural lens in an eye in which various annular portions of the lens have different powers and focal lengths to produce in-focus images, on different portions of the retina, of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out of focus images and concentrate on the in focus image of the object selected by the brain for consideration.

Cylindrically segmented zone of focus artificial lens

An intraocular lens including an annular Fresnel lens for implant in the anterior chamber, the posterior chamber or in the cornea of the eye. The Fresnel lens can be made of polymethylmethacrylate (PMMA) or a high index of refraction material. The lens is an annular lens with centers of curvature of different rings receding from the axis according to the distance from the center so as to minimize spherical aberration where the only spherical surface is the central part of the lens, that central part can be plano-convex. A composite material can overlay the Fresnel elements providing a smooth entrant surface. The composite material can be a crystalline or other material which changes index of refraction when excited with electrical power or radiant energy.

Intraocular lens

A rimmed intraocular lens including an optic and a rim about the lens optic which has a finite width and height of a geometrical cross section. The rim provides for capture of the lens optic in the capsular bag and prevents the cutting or wearing through of the capsular bag. The rim can be attached to a meniscus lens optic, a bi-convex optic, or a plano-convex optic. The rim can be positioned up, equal, or down with respect to the planar access of the lens optic. The rim can be of the same material as the lens optic, or it can be of a different material to preclude edge effect and glare and joined to the lens optic.

An implantable or contact lens for replacement of a defective natural lens in an eye in which various portions of the lens have different powers and focal lengths to produce in-focus images on different portions of the retina, of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.

Multiple element zone of focus artificial lens

A color ringed or rimmed edge intraocular lens for implant in either the anterior chamber, the posterior chamber or the cornea of the eye. The lens has a colorless or clear central region of a material such as polymethylmethacrylate (PMMA) and a peripheral surrounding portion of a dark material such as blue PMMA. Polysulfone can also be utilized. The lens can be fabricated by passing a clear rod of optical quality PMMA through an extrusion orifice and coating the circumference of the rod with a layer of predetermined thickness of colored, preferably blue PMMA or other compatible material. Other methods of fabrication can include the introduction of a suitable dye into the outer regions of the rod, or joining the clear central region to a ring of colored material by thermal adhesive bonding or other known processes.

Method of making an intraocular lens

A light weight intraocular lens for placement in a capsular bag, including a small hard inner lens optic and a soft pliable skirt surrounding the lens optic. The lens optic is a bi-convex optic. The lens optic is a high refractive index material and has a diameter of about 2-4 mm and utilizes a laser discussion yag space. The soft pliable skirt with an inner circumference channel secures about an edge of the lens optic and extends away at a downwardly sloping angle. The bottom edge of the skirt can be continuous or intermittent, and can include a single or dual ridge barrier. The outer diameter of the lens skirt can be up to 8-9 mm.

An accommodating lens including a lens optic with two indexes of refraction, the indexes of refraction based on dual cylindrical materials of the lens optic or a dual composite material of the lens optic. The dual cylindrical material or dual composite material of the lens optic is of PMMA. The lens can be either a posterior chamber lens or an anterior chamber lens, and include a plurality of outwardly extending loops.

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Orono, MN, United States of America

Dennis T Grendahl