METHOD OF REMOVING INTRAOCULAR LENS (VERSIONS) Russian patent published in 2024 - IPC A61F9/07 A61F2/16 

FIELD: medicine; ophthalmology.

SUBSTANCE: according to the first version of the invention, one-piece S-shaped lens is removed by performing a main corneal tunnel self-sealing incision with width of 2.0 mm and an auxiliary paracentesis of 1.0 mm, through which viscoelastic is introduced. Thereafter, the intraocular lens is grasped and held by collet forceps through the paracentesis. Partially fragmented through the main incision using collet shears by performing at least four parallel sections of the optical part of the intraocular lens, alternating directions of cuts by making adjacent lines of cuts towards each other from diametrically opposite edges of the lens, not reaching the other edge by 1 mm. Thereafter, the second collet tweezers are used to pull the lens out into the main incision and pull it out in zigzag motions as a single fragment. According to the second version of the invention, lens containing four haptic elements is removed by performing a corneal tunnel self-sealing incision 1.8 mm wide and auxiliary paracentesis 1.0 mm through which a viscoelastic is introduced. Thereafter, the intraocular lens is grasped and held by collet forceps through the paracentesis. Two diametrically opposite haptic elements are cut off through the main incision, after which optical part is partially fragmented using collet shears by performing at least four parallel cuts, alternating directions of cuts by making adjacent lines of cuts towards each other from diametrically opposite edges of the lens, not reaching the other edge by 1 mm. Thereafter, the second collet tweezers are used to pull the lens out into the main incision and pull it out in zigzag motions as a single fragment. According to the third version of the invention, a lens comprising two haptic elements is removed, which are interconnected with the optical part by means of two legs, a corneal tunnel self-sealing incision 2.0 mm wide and auxiliary paracentesis 1.0 mm are made, through which a viscoelastic is introduced. Thereafter, the intraocular lens is grasped and held by collet forceps through the paracentesis. Through the main incision in two haptic elements, one leg is cut off on diametrically opposite sides of the lens. Thereafter, the optical part is partially fragmented using a collet shears by making at least four parallel cuts, alternating directions of cuts by making adjacent lines of cuts towards each other from diametrically opposite edges of the lens, not reaching the other edge by 1 mm. Thereafter, the second collet tweezers are used to pull the lens out into the main incision and pull it out in zigzag motions as a single fragment.

EFFECT: group of inventions makes it possible to increase efficiency of IOL removal from mini-approach, to reduce traumatism during intraocular lens removal operation.

12 cl, 3 dwg, 3 ex