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  Insertion device for intraocular lensUSPTO Application #: 20070270945Title: Insertion device for intraocular lens Abstract: An insertion device for an intraocular lens is disclosed which can prevent leakage of a liquid in the device and can house and store a lens as well as the liquid. The insertion device includes a main body including a lens housing portion that houses the lens and an insertion cylindrical portion that feeds the lens into an eye, a pushing shaft that moves the lens from the lens housing portion in the front end direction to push out the lens into the eye through the insertion cylindrical portion, and a lens holding member that holds the lens, and is placed in the lens housing portion. The lens housing portion has a shape that receives insertion of the lens holding member from the rear. (end of abstract) Agent: Morgan & Finnegan, L.L.P. - New York, NY, US Inventors: Kenichi Kobayashi, Shinobu Toyomane USPTO Applicaton #: 20070270945 - Class: 623 612 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070270945. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]The present invention relates to an insertion device for inserting into an eye an intraocular lens that is inserted instead of a crystalline lens after the crystalline lens is extracted because of cataract or inserted into an eye in order to cure abnormal refraction. [0002]In current operations for cataract, the central portion of the anterior capsule of an eyeball is ablated, a clouded crystalline lens is removed by an ultrasonic suction apparatus, and then an artificial intraocular lens (hereinafter simply referred to as a lens) is placed in the position of the removed clouded crystalline lens. When placing the lens in the eyeball, an operation method for inserting the lens into the eyeball through a small incision by using the flexibility of the lens and thereby deforming the lens, e.g. folding the lens into a small shape is the mainstream. [0003]In the case of an operation, an insertion device is frequently used which deforms a lens set in a main body of the device into a small shape while moving the lens in the main body of the device by a pushing shaft and pushes out the lens into the eye from a front end opening of an insertion cylinder (nozzle) inserted into the incision. This insertion device is used not only for the operation of cataract but also for a lens inserting operation for an eyesight correction medical treatment. [0004]When the lens is inserted into an eye by using the insertion device, a viscoelastic material such as sodium hyaluronate is introduced into the main body of the insertion device as a lubricant so that the lens is smoothly moved and deformed in the insertion device (see Japanese Patent Laid-Open No. 2004-351196). Moreover, the viscoelastic material has a function of spreading the space of the anterior chamber of the eye into which the lens will be inserted by being introduced into the eye through the insertion cylinder. [0005]Further, it has been recently required to use inexpensive physiologic saline in place of the viscoelastic material. [0006]However, when the main body of the insertion device is constituted by a plurality of components assembled to each other, for example, when a lens setting portion in the main body has a divided structure or an openable and closable structure, a liquid such as a viscoelastic material or physiologic saline leaks from a gap created at the assembled portion. The leaking liquid makes the insertion device slippery or soils the periphery of the device. [0007]In the case of a conventional operation, a liquid is introduced into the insertion device immediately before the operation, which takes time and places a heavy burden on an operator or an assistant. [0008]Further, even if the liquid such as a viscoelastic material or physiologic saline is introduced into an eye, a large amount of liquid leaking from a gap between an edge of an incision in the eye and an insertion cylinder (an amount of leakage outside the eye) prevents an increase in ocular tension and sufficient inflation of the anterior chamber. [0009]To a pushing shaft, an elastic member such as rubber is frequently mounted for preventing a lubricant introduced into the main body from leaking from between an inner peripheral surface of the main body and the pushing shaft, and providing proper resistance (sliding feeling) to an operation of the pushing shaft. [0010]In the conventional insertion device, the elastic member is secured to one or a plurality of points close to each other on the pushing shaft, and moved relative to the main body with the operation of the pushing shaft. This cannot prevent the pushing shaft from being inclined radially with respect to the main body around a contact position between the elastic member and the main body in the operation of the pushing shaft. [0011]However, if the pushing shaft is inclined with respect to the main body, the front end of the pushing shaft is not precisely brought into contact with the lens placed in the main body, which may prevent the lens from being properly pushed out. BRIEF SUMMARY OF THE INVENTION [0012]The present invention provides an insertion device for an intraocular lens that can prevent leakage of a liquid in the device, and can house and store a lens as well as the liquid. [0013]The present invention also provides an insertion device for an intraocular lens that can restrict the amount of leakage outside an eye of a liquid introduced into the eye through an insertion cylinder. [0014]The present invention further provides an insertion device for an intraocular lens that can prevent inclination of a pushing shaft with respect to a main body, and can properly push out a lens. [0015]As one aspect, the present invention provides an insertion device for an intraocular lens which comprises a main body including a lens housing portion that houses the lens and an insertion cylindrical portion that feeds the lens into an eye, a pushing shaft that moves the lens from the lens housing portion in the front end direction to push out the lens into the eye through the insertion cylindrical portion, and a lens holding member that holds the lens and is placed in the lens housing portion. The lens housing portion has a shape that receives insertion of the lens holding member from the rear. [0016]As another aspect, the present invention provides an insertion device for an intraocular lens which comprises an insertion cylinder that is inserted into an incision formed in an eyeball and feeds the lens into the eyeball, and a pushing shaft that pushes out the lens into the eyeball through the insertion cylinder. The insertion cylinder is provided with a cover portion that is brought into contact with the eyeball to cover at least part of the incision into which the insertion cylinder is inserted. [0017]As yet another aspect, the present invention provides an insertion device for an intraocular lens which comprises a main body in which the lens is placed, a pushing shaft that pushes out the lens from the main body into an eye, and a plurality of elastic members that are placed between the pushing shaft and the main body and have a distance changeable with movement of the pushing shaft relative to the main body. [0018]Further objects and features of the present invention will be become more apparent from the following description of preferred embodiments with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0019]FIG. 1A is a top view and a side view of an insertion device for an intraocular lens that is an embodiment of the present invention; [0020]FIG. 1B is a sectional view of a lens housing portion in a main body with a nozzle of the embodiment; [0021]FIG. 1C is a sectional view of a nozzle portion in the main body with a nozzle of the embodiment; Continue reading... Full patent description for Insertion device for intraocular lens Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Insertion device for intraocular lens patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Insertion device for intraocular lens or other areas of interest. ### Previous Patent Application: Device and method for improving heart valve function Next Patent Application: Transforaminal intersomatic cage for an intervertebral fusion graft and an instrument for implanting the cage Industry Class: Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor ### FreshPatents.com Support Thank you for viewing the Insertion device for intraocular lens patent info. IP-related news and info Results in 0.29461 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf |
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