Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A posterior chamber lens including a plano-convex polymethylmethacrylate (PMMA) optic and two smooth, monofilament, curved, flexible loops attached to and extending from the optic. Each of the loops, also of PMMA, is angulated 10.degree. anteriorly from the plano surface of the optic. The optic is reversed such that the convex surface is posterior and is provided with positioning holes. The PMMA decreasing radius loops and optic provide for a flexible, lightweight and edge-thin lens and loops. The PMMA loops' angulation and plano-convex optic design vault the lens away from the iris. The positioning holes are situated at 12 and 6 o'clock positions and are of a predetermined desired size. A second embodiment of the PMMA lens includes PMMA loops which are substantially parallel to the planar surface of the lens. A third embodiment of the PMMA lens includes PMMA loops which are 10.degree. anteriorly from the convex surface of the optic.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A colored 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 or adhesive bonding or other known processes.

Abstract: Intraocular lens including a meniscus lens optic with a convex anterior surface, a concave posterior surface and a double barrier ledge. The double barrier ledge includes an interrupting channel. A plurality of loops, such as continuously curved J-shaped blue loops, secure at an angle of 0.degree.-10.degree. to the plane of the optic. The double barrier ledge, including the U-shaped channel or other geometrically configured channel between the two ledges, provides a double barrier ledge like seal around the posterior capsule of the eye holding back migration of the cortical epithelium. The double barrier ledge causes a seal which prevents aqueous flowing back to the optical zone of the capsular bag. In the case of a dissection or laser capsulotomy, the double barrier seal prevents vitreous strands from passing beyond and inner edge of the ledge. Other optics for lenses, such as plano-convex or bi-convex, can utilize the double ledge principle.

Abstract: A corneal inlay for implant within the cornea and of a material such as polysulfone or PMMA, including a plurality of small holes or pores to pass nutrients and fluids from the bottom surface layer of the cornea to the top surface layer of the cornea. The holes can be round, the holes can be rectangular in configuration, or the holes can be slits in configuration, preferably small enough so that the holes are not visible to the naked eye. The holes can be particularly slots of a finite width and length, either adjacent to the edges of the inlay or across the surface of the inlay. The holes also provide for breathing and passage of nutrients and fluids, as well as oxygen transmission, between the upper and lower surfaces of the cornea in which the inlay has been implanted.

Abstract: Intraocular lens including a plano-convex lens and a plurality of flexible closed loops spaced about a circumference of an edge of the lens, one end of each closed loop fixedly secured into a hole in the edge and the other end of the closed loop in slidable engagement with an other hole in the edge, the other hole of a larger geometrical cross section than the cross section of the slidable end of the closed loop thereby providing an all-size lens. The arms of each loop can be planar or vaulted. A geometrical section of loop material such as a U-shaped curve or S-shaped curve can be positioned in the loop providing for additional sizing, adjusting and positioning of the slidable end of the loop. Pressure-relief ports can be provided through a port in the convex surface, the plano surface, or the edge or any combination thereof. Pressure relief can also be provided through an elliptical or notched hole for the slidable end of the loop, or a notched or tapered portion of the slidable end of the loop.