RU2209610C2 - Method for removing posterior-chamber lens decentering with supporting elements as elastoflexible filaments - Google Patents

Abstract

FIELD: medicine, ophthalmosurgery. SUBSTANCE: the suggested method deals with affecting intraocular lens through patient's pupil without lancing patient's eyeball. One of the supporting elements, mostly replaced against central optic ocular axis, at the site adjacent to optic part of intraocular lens, should be dissected due to YAG laser for spontaneous spreading of supporting element inside posterior ocular chamber and replacing optic part of lens towards central position. EFFECT: decreased traumaticity level of operation conducted. 2 dwg, 2 ex

Description

 The invention relates to medicine, and more particularly to ophthalmology.

 A known method of eliminating the decentralization of intraocular lenses (Fedorov S.N., Egorova E.V. Errors and complications when implanting an artificial lens. - M., 1992, p. 238). The method consists in opening the eyeball, centering the lens using special tools and surgical fixation of one or two supporting elements with sutures to the iris.

 However, this method has significant disadvantages: high invasiveness of the operation.

 Solved technical problem: reducing the morbidity of the operation.

 The specified technical problem is solved by the fact that in the method of eliminating the decentration of posterior chamber intraocular lenses (IOLs) with support elements in the form of elastic-elastic threads, which consists in acting on the IOL, one of the support elements, most offset from the central optical axis of the eye, in a place adjacent to to the optical part of the IOL is dissected using a YAG laser, through the pupil, without opening the eyeball, for spontaneous straightening of the support element inside the posterior chamber of the eye and moving the optical part of the lens to the center position.

 The invention is illustrated by the drawings shown in figure 1 and figure 2. In FIG. 1 shows the position of the intraocular lens 1 before surgery, where one of the supporting elements 2, the most offset from the central optical axis of the eye 3, at the point 4 adjacent to the optical part 5 of the intraocular lens 1 is dissected using a YAG laser, and FIG. 2 shows the position intraocular lens 1 after surgery, where the supporting element 2 inside the back chamber 6 of the eye spontaneously straightens and the optical part of the lens 5 is moved to a central position.

 The proposed method is as follows.

 The posterior intraocular lens 1 with supporting elements 2 in the form of elastic-elastic threads is shown in figure 1. One of the supporting elements 2, the most offset from the Central optical axis of the eye 3, in place 4, adjacent to the optical part 5 of the intraocular lens 1 is dissected using radiation from a YAG laser. At the same time (Fig. 2), the supporting element 2 spontaneously straightens inside the rear camera 6 of the eye and the optical part of the lens 5 moves to a central position. When cutting the support element 2, the following YAG laser parameters were used: the radiation wavelength was 1.064 μm, the pulse energy was from 2 mJ to 6 mJ, the pulse duration was 7-10 ns, and the number of pulses was up to 20.

 It should be especially noted that the dissection of the support element is performed without opening the eyeball.

 The proposed method is characterized by the following clinical examples.

 Example 1

 Patient D., 63 years old. Diagnosis: left eye - artifact, IOL decentration, right eye - healthy.

 The patient has 3 months. back on the left eye, extracapsular cataract extraction was performed with implantation of the I-model T-26, with an optical power of 21 D.

Left eye:
Visual acuity - 0.05 sph + 12.0 = 0.8
Ophthalmometry - - 42.75 - 98 ^o - 41.20 - 8 ^o
Tonometry - 17 mmHg

 In order to eliminate the decentralization of IOL on the left eye, the operation according to the invention was performed on an outpatient basis.

The operation and the postoperative period proceeded without complications. On the 2nd day, visual acuity - 0.6 cyl - 1.5 ax 12 ^o = 0.9.

Ophthalmometry - - 42.75 - 98 ^o - 41.20 - 8 ^o
Tonometry - 18 mmHg

 The IOL is central.

 Example 2

 Patient Z., 79 years old. Diagnosis: the right eye is artifact, IOL decentration, the left eye is healthy.

 The patient has 5 months. back on the right eye was performed tunnel extracapsular cataract extraction with implantation of IOL model T-26, the optical power of 22 D.

Right eye:
Visual acuity - 0.3 cyl - 2.5 ax 25 ^o = 0.9
Ophthalmometry - - 43.60 - 110 ^o - 42.55 - 20 ^o
Tonometry - 15 mmHg

 In order to eliminate postoperative astigmatism on the left eye, the operation according to the invention was performed.

The operation and the postoperative period proceeded without complications. When discharged from the hospital, on the 2nd day, visual acuity - 0.5 cyl - 1.5 ax 28 ^o = 1.0.

Ophthalmometry - - 43.60 - 110 ^o - 42.55 - 20 ^o
Tonometry - 17 mmHg

 The IOL is central.

 Thus, the use of the proposed invention allows atraumatic, without opening the eyes to eliminate the decentralization of IOL.

Claims (1)

 A method for eliminating the decentration of posterior intraocular lenses with supporting elements in the form of elastic-elastic threads, which consists in acting on the intraocular lens, characterized in that they cut the support element most offset from the central optical axis of the eye, in a place adjacent to the optical part of the intraocular lens, using YAG laser, for spontaneous expansion of the support element inside the posterior chamber of the eye and moving the optical part of the intraocular lens to a central position.

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