83 results about "Posterior capsule" patented technology

A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly against the posterior capsule. The periphery of the first optic contains a pair of clasps. The second optic is located anteriorly to the first optic and is of a positive power. The peripheral edge of the second optic contains a pair of locking arms that fit into the clasps contained on the periphery of the first optic to lock the second optic onto the first optic, but allow for rotation of the arms within the clasps. Hinge structures on the locking arms allow the second optic to move relative to the first optic along the optical axis of the lens system in reaction to movement of the ciliary muscle.

An intraocular lens structure for reducing complications is disclosed. The intraocular lens structure comprises an optic, a support and a closing fixture. The closing fixture is a groove or a valley formed on the side portion of the optic of the intraocular lens. The valley is formed by the optic and a protrusion projecting posteriorly from the optic. The groove or the valley in the optic is made engaged with the posterior capsular opening generally over the entire circumference of the groove or the valley to close the opening of the posterior capsule.

Intraocular rings, intraocular lens systems, and associated methods are disclosed. In some instances, the intraocular rings are formed of biocompatible pharmaceutical delivering materials and are configured to be implanted with conventional intraocular lens designs. The intraocular rings include engagement features for interfacing with haptics of the conventional intraocular lens designs in order to ensure proper orientation of the intraocular ring and intraocular lens relative to one another. In some instances, the intraocular rings also include haptics to encourage centering of the intraocular ring within the posterior capsule. The intraocular rings also serve to prevent posterior capsular opacification.

A lenticular capsule-expanding device is arranged in a lens capsule in a cataract surgery, etc. The device includes a front supporting section to be arranged in contact with an inner surface of an anterior capsule, the front supporting section, a rear supporting section to be arranged in contact with an inner surface of a posterior capsule, the rear supporting section being arranged behind the front supporting section, and a connecting section that connects the front and rear supporting sections in a manner as to have an urging force for separating the front and rear supporting sections in a separating direction. By the urging force of the connecting section, the front supporting section presses against the inner surface of the anterior capsule and the rear supporting section presses against the inner surface of the posterior capsule.

An object of one aspect of the present invention is to obtain a measurement value in accordance with the condition of a crystalline lens of an examinee's eye. An apparatus for measuring ocular axial length includes: a measuring unit which irradiates measurement waves toward a fundus of the examinee's eye, and calculates the ocular axial length of the examinee's eye based on detection signals obtained from reflected waves including waves reflected from the fundus; and a determining unit which acquires reflection information related to an anterior segment of the examinee's eye, extracts reflection signals corresponding to a reflection object between a cornea and a posterior capsule of a crystalline lens based on the acquired reflection information, and determines whether the examinee's eye is a phakic eye or an IOL eye based on the extracted reflection signals.

A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly within the capsular bag and lying against the posterior capsule. The periphery of the first lens is attached to a ring-like structure having sloping sides. The second lens is located anteriorly to the first lens within of the capsular bag and is of a positive power. The peripheral edge of the second lens contains a plurality of haptics that project posteriorly from the second lens and toward the first lens. The haptics are relatively firm, yet still flexible and ride within the sloping sides of the ring-like structure, so that flattening or steepening of the capsule in reaction to movement of the ciliary muscle and corresponding shrinkage of the capsular bag causes the second lens to move along the optical axis of the lens system.

The present invention relates to a model for surgical operation for an eye with cataract comprising a pig's eye which is prepared by injecting self hardening type chemicals into a crystalline lens capsule or into an empty crystalline lens capsule of said pig's eye, further relates to a model for an enucleating operation of a fallen nucleus lens which is prepared by falling the hardened chemicals into corpus vitreum by breaking posterior capsule of crystalline lens consciously.

An intraocular lens includes a lens capsule expanding device and an optical portion. A front supporting portion makes contact with an inner surface of an anterior capsule. A rear supporting portion makes contact with an inner surface of a posterior capsule while facing the front supporting portion. A connecting portion connects the front supporting portion and the rear supporting portion so as to have a biasing force to separate the front supporting portion and the rear supporting portion. Due to the biasing force, the front supporting portion presses the inner surface of the anterior capsule and the rear supporting portion presses the inner surface of the posterior capsule. The optical portion changes the curvature of a central portion according to movement of the connecting portion that moves the front supporting portion and the rear supporting portion closer to or away from each other with movement of the lens capsule.

The CCUTTER is an innovative ophthalmologic surgical instrument that greatly facilitates the performance of cataract surgery. Cataract surgery is the most frequently performed surgery in the United States, with over one million cataract surgeries done each year. A cataract is a clouding of the eye's internal lens, which interferes with the individual's ability to see clearly. During surgery, a continuous circular tear (called capsulorhexis) is made in the anterior capsule of the crystalline lens of the eye, and the front surface of the cataract is opened to allow access to the clouded tissue inside. The cloudy portion is then removed, leaving the thin clear back surface of the lens (called the posterior capsule) in place. A lens implant is then placed in the shell of the natural lens, and the incision is closed. The CCUTTER is designed to improve the predictability and consistency of performing the capsulorhexis during cataract surgery.

Several methods for preventing, minimizing, or delaying the incidence of posterior capsule opacification are provided. A first method involves chemically activating the surface of an implantable ocular device, such as an intraocular lens or a capsular tension ring, by grafting a chemical moiety onto the surface of the device, covalently attaching a non-cytotoxic inhibitor compound to the chemical moiety to produce an inhibitor implantable ocular device, and implanting this inhibitor implantable ocular device into the capsular bag of an eye of a patient during extracapsular cataract surgery. Appropriate inhibitor compounds include RGD mimetics, RGD peptides, and flavonoids. A second method involves surface modifying the exterior surface of a capsular tension ring by covalently attaching a mitotic inhibitor, preferably a conjugate of methotrexate and a bovine serum albumin, and implanting this inhibitor tension ring into the capsular bag of an eye of a patient during extracapsular cataract surgery. A third method involves surface modifying the exterior surface of a capsular tension ring by coating or grafting the exterior surface with a charged polyethylamine and implanting this inhibitor tension ring into the capsular bag of an eye of a patient during extracapsular cataract surgery. An implantable ocular device according to the invention, such as an intraocular lens or a capsular tension ring, contains a substrate with a chemical moiety grafted thereon and a non-cytotoxic inhibitor compound covalently bonded to the chemical moiety or contains a substrate modified with a mitotic inhibitor or charged polyethylamine. The inhibitor devices inhibits proliferation and migration of lens epithelial cells on the posterior capsule of the eye of the patient, thereby preventing, minimizing, or delaying the onset of posterior capsule opacification.