Lens delivery system

Crystal transportation system

Field of invention

The present invention relates to lenses (IOLs), especially devices for injecting IOLs into the eye.

Background of the invention

In its simplest nature, the function of the human eye is to provide vision. This is achieved by transmitting and reflecting light through a transparent exterior called the cornea, and then using a lens to focus the image on the retina behind the eye. The quality of the focused image depends on many factors, including the size, shape and length of the eye, as well as the shape and transparency of the cornea and lens.

When trauma, age, or disease cause the lens to become less transparent, vision will deteriorate due to the reduction of light that can be transmitted to the retina. This defect in the lens of the eyeball is medically called a cataract. The treatment for this symptom is surgical removal of the lens and implantation of an artificial lens or IOL.

Early IOLs were made of soft foldable IOLs made of hard rubbers such as polymethylmethacrylate (PMMA) and silicone, while soft acrylic and hydrogels can be folded or wound around these soft crystals and used It is becoming more and more popular to insert it with a smaller incision. There are many ways to wind or fold the crystal. One of the common methods is the injection cartridge, which folds the lens and allows the lens to be pushed into the eye through a relatively small-diameter lumen, generally a soft-pointed piston or the like. The most commonly used injection cartridge design is illustrated in US Patent No. 4,681,102 (Bartell), which includes a bifurcated and longitudinally hinged cartridge. Similar designs are exemplified in U.S. Patent Nos. 5,494,484 and 5,499,987 (Feingold) and 5,616,148 and 5,620,450 (Eagles et al.). In order to avoid the scope of patent application of U.S. Patent No. 4,681,102, several solid boxes have been proposed. Refer to U.S. Patent Nos. 5,275,604 (Rheinish et al.) and 5,653,715 (Reich et al.).

These devices are designed to implant single-piece or integrally formed lenses. IOLs currently under development include multi-component crystals, such as crystal systems with separate crystals and stabilizer rings. These two components must be implanted in the capsule bag and assembled to complete the system. None of the conventional injection cartridges can inject all the components of the multi-component lens system into the capsule bag.

Therefore, it is necessary to invent a crystal delivery system that can inject all the components of a multi-component crystal system into the capsule bag.

Summary of the invention

The present invention provides a crystal transport system with a double folding mechanism to improve the prior art. The first mechanism is configured to fold a crystal stabilizer ring, and the second mechanism is configured to fold a crystal lens.

Therefore, one of the objectives of the present invention is to provide a lens transportation system that can store, ship, and transport the lens to the eye without using additional devices.

Another object of the present invention is to provide a crystal delivery system that can fold the crystals made of soft acrylic material.

Another object of the present invention is to provide a crystal transport system with a double folding mechanism.

Other objects, features, and advantages of the present invention will be self-evident after referring to the drawings and the following description of the drawings and the scope of patent application.

Schematic description

Figure 1 is an exploded perspective view of the crystal transport system of the present invention in an open position; Figure 2 is a perspective view of the crystal transport system of the present invention in an open position; Figure 3 is a perspective view of the crystal transport system of the present invention in a closed position A perspective view of the lens when it is ready to be folded; Figure 4 is a perspective view of the lens transport system of the present invention in a closed position, in which the front or distal folding mechanism has partially folded the stabilizer ring of a lens system; Figure 5 is A side elevation view of a handpiece that can be used in the crystal transport system of the present invention; Figure 6 is an enlarged elevation view of the distal tip of the handpiece shown in circled part 6 in Figure 5; Figure 7 is a A perspective view of a handpiece that can be used in the lens transport system of the present invention; and Figure 8 is an enlarged perspective view of the lens transport system of the present invention, in which the lens transport system is inserted into the remote of the handpiece shown in Figure 5. end.

Detailed description of the preferred embodiment

As shown in FIG. 1, the crystal transportation system 10 of the present invention generally includes a box main body 12, a ring pusher 14, a piston 16, and a shipping lock 18. The box body 12 generally includes a distal nozzle 20, a ring folding platform 22 and a lens folding platform 24. The ring part 26 of the multi-component lens is arranged in the ring folding platform 22 and is formed by the ring pusher 14 and by folding the ring platform cover 28 over the ring folding platform 22 and buckle the cover 28 with the fastener 36 Then, the ring portion 26 is installed in the ring folding platform 22, as shown in FIG. 3. The lens part 30 of the multi-component lens is arranged in the lens folding platform 24 and is fixed to the shipping lock 18 by the brake 32 and by folding the lens folding platform cover 34 above the lens folding platform 24, as in the first Figure 3 shows. The cover 34 is locked in the folded position by a fastener 38.

The nozzle 20 is preferably hollow and has a size that can be inserted into the ring portion 26 and the lens portion 30 with a relatively small (for example, about 2 mm or less) incision. The cover 28 and the cover 34 may include parts 40 and 42, respectively, so that viscoelastic materials can be introduced into the ring folding platform 22 and the lens folding platform 24 and around the ring part 26 and the lens part 30.

As shown in FIGS. 5 and 6, the handpiece 100 that can be used as a part of the crystal transportation system 10 roughly includes a tubular body 102, a piston rod 104, and a finger ring 106. As shown in Figure 6, the distal end 108 of the main body 102 includes a notch portion 110. The notch portion 110 is cut in size and shape so that it can be received by, for example, using a locking tab 50 on the box main body 12 and The box main body 12 is firmly supported. The remote end 108 also includes a buffer 112, the function of which is described below. The piston rod 104 pushes the finger ring 106 to reciprocate in the main body 102. The piston rod 104 can be mounted on a spring (not shown in the figure) in the main body 102 to provide tactile feedback.

When in use, the shipping lock 18 and the piston 16 are installed on the box main body 12 in the manner shown in Figures 1 and 2. The ring portion 26 and the lens portion 30 are placed in the box main body 12 as shown in FIG. 2, and the covers 28 and 34 are closed, as shown in FIG. 3. The shipping lock 18 prevents the ring pusher 14 from moving during shipment, and the tab 60 on the ring pusher 14 prevents the piston 16 from moving forward. The stopper 32 and the piston rod guide 70 prevent the lens part 30 from moving during shipment. When ready to use, the shipping lock 18 is removed and the ring pusher 14 is pressed inwardly, as shown in FIG. 4, and locked in position by the fastener 19. This action of the ring pushing member 14 causes the ring portion 26 to fall down or fold, so that the ring portion 26 fits into the nozzle 20. This action also aligns the notch 62 in the tab 60 with the piston 16, thereby causing the piston 16 to move forward. A viscoelastic material is injected into the nozzle 20 through the portions 40 and 42. The box body 12 is installed in the notch portion 110 of the distal end 108 of the handpiece 100, as shown in FIG. 8. This installation causes the piston rod 16 to contact the bumper 112 and be slightly pushed forward by it. This action causes the lens part 30 to slightly push forward and causes the lens part 30 to fold. The piston rod 104 is moved forward by the rod guide 70 and guided to contact the lens part 30. Further movement of the piston rod 104 will cause the lens part 30 to be pushed into the inner diameter 80 of the box body 12 to contact the compressed ring part 26 and will cause the ring part 26 and the subsequent lens part 30 to follow The sequential manner is pushed out of the nozzle 20.

Although several embodiments of the present invention are described above, these descriptions are provided for the purpose of illustration and explanation only. Variations, alterations, modifications and deviations of the above-mentioned systems and methods can be adopted without departing from the scope or spirit of the present invention.

<p>10Crystalline transportation system</p><p>12Box body</p><p>14Circular pusher</p><p>16Piston</p><p>18Shipping lock</p><p>19,36,38Fasteners</p><p>20Nozzle</p><p>22Ring folding platform</p><p>24Crystal Folding Platform</p><p>26ring part</p><p>28Ring platform cover</p><p>30Crystal part</p><p>32Brake parts</p><p>34Crystal Folding Platform Cover</p><p>Part 40,42</p><p>50,60Patch</p><p>62Notch</p><p>70Piston rod guide</p><p>80Inner diameter</p><p>100Handheld</p><p>102Tube body</p><p>104Piston rod</p><p>106Finger Ring</p><p>108Remote</p><p>110Notch part</p><p>111Buffer</p><p>112Buffer</p>

Figure 1 is an exploded perspective view of the crystal transport system of the present invention in an open position; Figure 2 is a perspective view of the crystal transport system of the present invention in an open position; Figure 3 is a perspective view of the crystal transport system of the present invention in a closed position A perspective view of the lens when it is ready to be folded; Figure 4 is a perspective view of the lens transport system of the present invention in a closed position, in which the front or distal folding mechanism has partially folded the stabilizer ring of a lens system; Figure 5 is A side elevation view of a handpiece that can be used in the crystal transport system of the present invention; Figure 6 is an enlarged elevation view of the distal tip of the handpiece shown in circled part 6 in Figure 5; Figure 7 is a A perspective view of a handpiece that can be used in the lens transport system of the present invention; and Figure 8 is an enlarged perspective view of the lens transport system of the present invention, in which the lens transport system is inserted into the remote of the handpiece shown in Figure 5. end.