Prevention Method Of Toric Intraocular Lens Rotation Using A Standard Capsule Ring

To evaluate the effectiveness of the method of preventing the toric intraocular lens rotation after phacoemulsification of cataracts by implantation of a standart capsule ring in the eyes with corneal astigmatism.

Department of Ophthalmology, Zaporizhzhia State Medical and Pharmaceutical University, Visus Clinic, Zaporizhzhia, Ukraine.

43 patients (59 eyes) were examined, who underwent surgery by phacoemulsification of cataracts with implantation of toric intraocular lenses (TIOL) to correct corneal astigmatism from 0.5D to 4.25D (by keratometry). Patients were divided into 2 groups. The first group  - 26 patients (31 eyes), what TIOL implantation according to standard techniques. The second group - 18 patients (28 eyes) who were operated on according to our proposed prevention method of TIOL rotation.  According to the method the ring is implanted in a capsule bag after implantation of TIOL, which is tentatively centered according to in the planned meridian. The ring is located on top of the haptic elements of TIOL. Patients were observed for 6 months after surgery.

6 months after surgery, rotation of the intraocular lens was detected in 22 eyes (70.9%) in the first group, in second group - in 42.85% of cases (12 eyes). It is important that in the group without use of the rotation prevention, in 13 eyes (59% of all rotated) was detected deviation of the TIOL axis within 6 degrees or more. In the second group in all 12 cases (100% of cases) the axis of the lens implantation was up to 6 degrees. The average deviation TIOL in the second group was 2.14 ± 0.4 degrees (max - 6°, min - 0°), which did not significantly impair visual function. In the group I, the average deviation of the TIOL position - 5.41 ± 1.01 degrees (max - 30°, min - 0°) that led to a decrease in visual acuity and caused discomfort.

The use of a standard capsular ring over the implanted TIOL to prevent its rotation according to the developed method allows to achieve rotational stability of the implanted lens, which ensures the effectiveness of operative treatment, ensures a stable refractive result of visual functions, prevents the need for repeated surgical interventions for repositioning the TIOL in cases of its rotation. The developed method can be recommended for use in practice.