METHOD OF INTRAOCULAR LENS (IOL) FIXATION IN CASE OF AVITRIA WITH ABSENCE OR INSUFFICIENCY OF CAPSULAR SUPPORT Russian patent published in 2025 - IPC A61F9/07 A61F2/16 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to ophthalmology. Intraocular lens (IOL) is fixed in case of absence or insufficiency of capsular support, at that on limb at distance of 2-3 mm from each other and parallel to each other, perpendicular to limb, the first and second paracenteses are made at 1.0 mm each. Then, the third and fourth paracenteses 1.0 mm each are made perpendicular to the limb so that they are located on the limb in the diametrically opposite position relative to the first and second paracentesis. Anterior chamber of the eye is filled with a viscoprotector. Coloboma is formed through each paracentesis under it in an iris root with vitreotome 27G. Each haptic element of the IOL is successively tied with one fixing suture, after which the IOL with tied fixing sutures on the haptic elements is inserted into the injector and implanted through the tunnel incision in the cornea into the anterior chamber of the eye. Then the hook is brought into the first paracentesis and the coloboma located under it, passed under the iris into the pupil area, one of the ends of the fixing suture of the first haptic element is grasped and brought back under the iris into the coloboma and brought out into the first paracentesis located above it. Further, the other end of the fixing suture of the first haptic element is delivered under the iris through the adjacent coloboma and delivered into the second paracentesis located above it. Thereafter, the ends of the fixing suture of the second haptic element are brought out through the third and fourth paracenteses similarly to the ends of the fixing suture of the first haptic element. Then a hook is brought into the first paracentesis; an end of the fixing thread brought out into the second paracentesis is captured in the corner of the anterior chamber of the eye, and it is brought back into the first paracentesis. Similar manipulations are carried out with the end of the filament of the second haptic element of the IOL, bringing it into the paracentesis located in the diametrically opposite position relative to the first paracentesis. Further, the IOL is threaded through the pupil zone by the iris; the ends of the fixing sutures of the haptic elements are tightened and the ends of the fixing suture of the first haptic element and the ends of the fixing suture of the second haptic element are tied separately. Remaining ends of the fixing sutures are cut off in the anterior chamber of the eye; then the viscoprotector is washed out from the anterior chamber, the paracenteses are hydrated.

EFFECT: method enables to provide a symmetrical topographically accurate location of points of fixation of haptic elements to the iris root and, accordingly, to achieve a centred position of the IOL; imposition of fixing sutures in a practically inert zone of the iris root, which does not affect its diaphragmatic function and, as a result, increases the quality and acuity of the patient's vision; reliable fixation and stable position of the IOL after its implantation, associated with the absence of tension of the iris root tissue when performing its diaphragmatic functions; absence of risks of IOL luxation into vitreal cavity during implantation; implantation of an IOL with fixing sutures by means of an injector, which enables to avoid unnecessary and complex manipulations in the anterior chamber.

1 cl, 2 ex