Abstract: A contact lens material comprising a condensation polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sup.1 is --C(CF.sub.3).sub.2 -- or ##STR2## R.sup.2 is a group represented by the formula: ##STR3## in which l is an integer of 1 to 3, m is an integer of 1 to 15 and n is an integer of 1 to 3, ##STR4## in which u is an integer of 1 to 3 and v is an integer of 1 to 3, a group represented by the formula (II): ##STR5## wherein R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same or different and each is hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or a group represented by the formula (III): ##STR6## wherein R.sup.7 is --C(CF.sub.3).sub.2 --, ##STR7## or a direct bond, and R.sup.8 and R.sup.9 are the same or different and each is an alkyl group having 1 to 3 carbon atoms, a fluoroalkyl group having 1 to 3 carbon atoms, hydrogen atom, hydroxyl group or carboxyl group.

Abstract: A method of producing an intraocular lens having integrally formed optic and haptic including the steps of: (a) preparing a polyimide powder having a repeated unit represented by the following formula: ##STR1## [in the formula, when R.sub.1 =--C(CF.sub.3).sub.2 --, R.sub.2 is selected from ##STR2## the polyimide powder having a particle size of less than 1 mm; (b) placing the polyimide powder between a pair of dies having a pattern corresponding to a part of the contour of the lens; (c) hot pressing the polyimide powder between the dies, to provide a molding having the above part of the contour of the lens; and (d) machining the molding to form the rest of the contour of the lens to thereby provide the overall shape of the intraocular lens.

Abstract: A material for one-piece intraocular lenses containing a copolymer whose main components are methyl methacrylate and at least one (meth)acrylate selected from an alkyl acrylate having a glass transition temperature of higher than 30.degree. C. and up to 100.degree. C. and a fluoroalkyl (meth)acrylate having a glass transition temperature of higher than 30.degree. C. and up to 100.degree. C. This material for one-piece intraocular lenses has excellent cutting-processability, grindability, machinability and suitable flexibility, and can be suitably used for not only one-piece intraocular lenses but also three-piece intraocular lenses.

Abstract: A process of producing a one-piece intraocular lens in which the lens includes an optical portion and at least one support portion produced integrally with each other, the process including the steps of (a) forming a first polymerized material into a lens blank, the lens blank including a convex portion to provide the optical portion of the intraocular lens, and a flange portion surrounding the convex portion, (b) applying, to one of opposite surfaces of the flange portion on a side of a convex surface of the convex portion, a monomer composition which is polymerizable to produce a second polymerized material different from the first polymerized material, the monomer composition including at least one polymerizable monomer, (c) polymerizing the monomer composition on the flange portion to provide a double-layer portion defined by the flange portion and the second polymerized material produced integrally with the lens blank from the monomer composition, and (d) forming the convex portion and double-layer porti

Abstract: An ultraviolet light absorbing occular lens comprising a vinyl type copolymer containing from 0.01 to 0.5% by weight of a benzotriazole type ultraviolet light absorbing monomer as chemically bonded therewith, the ultravioleet light absorbing monomer having the formula: ##STR1## (wherein R.sub.1 is H or CH.sub.3 and n is 2 or 3).

Abstract: A balloon for an intraocular lens, which is a unitary elastic hollow body made of an elastomer and having a convex lenticular shape without projections along its circumference, which gives, when inserted in a lens capsule, a configuration corresponding substantially to the shape of the lens capsule, said hollow body having a wall thickness of from 0.001 to 0.1 mm at its optical portion and a diameter of from 6 to 13 mm, and capable of being inflated in the lens capsule to form an intraocular lens when a light transmitting injection material is injected into the hollow body.

Abstract: An intra-ocular lens comprising a lens part and a fixing part for fixing the lens part in an eye, the lens part comprising a colorless and transparent polyimide containing at least one of repeating units represented by formulae (I) to (IV): ##STR1## wherein X.sub.1 represents ##STR2## X.sub.2 represents ##STR3## X.sub.3 represents ##STR4## Further, the lens part and the fixing part may be integrally molded together, if desired.

Abstract: A balloon for an intraocular lens, which is a unitary elastic hollow body made of an elastomer and having a convex lenticular shape without projections along its circumference, which gives, when inserted in a lens capsule, a configuration corresponding substantially to the shape of the lens capsule, said hollow body having a wall thickness of from 0.001 to 0.1 mm at its optical portion and a diameter of from 6 to 13 mm, and capable of being inflated in the lens capsule to form an intraocular lens when a light transmitting injection material is injected into the hollow body.

Abstract: In an automatic winder comprising plural winding units, a preset yarn quantity per lot and a residual quantity of yarn to be taken up are grasped upon generation of a full-loaded signal, then the number of operating winding units is decreased gradually, allowing operation of only winding unit or units of a number corresponding to the residual quantity of yarn to be taken up.

Abstract: A water-absorptive contact lens made of a copolymer comprising units of an ester of acrylic or methacrylic acid and at least one saccharide selected from D-galactose, D-glucose and D-mannose and units of at least one member selected from a hydrophilic monomer and a hydrophobic monomer, which has excellent oxygen permeability and affinity for the eye and can be worn continuously for a long period of time. The contact lens is prepared by polymerizing a monomer mixture containing an ester of acrylic or methacrylic acid with a ketalized saccharide and a hydrophilic monomer and/or a hydrophobic monomer, and after forming the resulting copolymer into a contact lens, if necessary, treating the copolymer having a shape of contact lens with an acid to convert the ketal groups into hydroxyl groups.

Abstract: Baked confections are prepared by coting edible particles, such as seeds or nuts or other particles of various foods, alternately with edible flour, such as cereal flours, or starches, and aqueous solutions such as a corn syrup, a sugar solution, a gum solution, or a dextrin solution in a coating device such as a revolving pan or drum until the size of the coated particles reach a predetermined size corresponding to the size of the inner cavity of a baking mold, subsequently baking such coated particles in a baking mold consisting of upper and lower matching units and having a desired shape, with or without engravings on its inner surface. The baked confections can be prepared in any shape in which the edible particle is in a movable state within the open space of the shell layer.