Rotational Stability after Toric Implantable Collamer Lens Implantation

PURPOSE: To evaluate rotational stability of Toric Implantable Collamer Lens (ICL) implantation to correct myopic astigmatism. METHODS: We estimated the degree of Toric ICL rotation together with change in visual acuity and astigmatism in 118 eyes of 66 patients who underwent Toric ICL implantation and had a long-term mean follow-up period of 37 months. RESULTS: After Toric ICL implantation, 107 (91%) out of 118 eyes showed uncorrected visual acuity of 0.8 or better. The mean postoperative astigmatism decreased to -0.64 +/- 0.61 D from a mean preoperative astigmatism of -2.96 +/- 1.13 D. The mean axis change of Toric ICL was 2.4 +/- 3.8 degrees during follow-up period. Two (1.7%) out of 118 eyes showed the axis change of more than 10 degrees. These two eyes had a decrease in visual acuity, rotational axis change of 18 degrees and 30 degrees, respectively, and increases in astigmatism of 1.50 D and 1.00 D, respectively. The remaining 116 eyes (98.3%) showed excellent rotational stability without visual acuity decreasing Toric ICL rotation during the follow-up period. CONCLUSIONS: Toric ICL implantation to correct high myopia with astigmatism rarely has axis rotation and maintains excellent rotational stability for long-term follow-up.

Intraindividual Comparison of ICL and Toric ICL Implantation in the Correction of High Myopia With Astigmatism

PURPOSE: We compared intra-individual visual outcomes and patient satisfaction after implantable contact lens (ICL) and Toric ICL implantation. METHODS: Twenty-eight eyes of 14 patients were enrolled in this retrospective study. One eye of each patient was assigned to ICL (ICL Group), and the contralateral eye was allocated to Toric ICL (Toric ICL Group). All patients were examined for visual acuity, refraction, intraocular pressure, slit lamp measurements, and satisfaction one week, one month, two months, and six months postoperatively. RESULTS: Mean spherical equivalents of the two groups were corrected from -7.83D (ICL Group) and -5.55D (Toric ICL Group) to 0.13D and 0.20D, respectively, and the mean refractive cylinders were corrected from 0.92D and 2.60D to 0.42D and 0.27D, respectively, at six months postoperatively. The myopias of these two groups and the astigmatism of the Toric ICL group were effectively corrected. The uncorrected visual acuity (UCVA) of the two groups were 1.02 and 1.05, respectively, at six months postoperatively. The safety index, efficacy index, predictability, and stability were favorable. There were no significant differences between the two groups in terms of postoperative UCVA, intraocular pressure(IOP), vaulting, noticeable complications, or patient satisfaction. CONCLUSIONS: The results show ICL implantation is effective treatment for high myopia, and Toric ICL implantation is a viable surgical option for the treatment of compound myopia astigmatism. Selection of proper phakic intraocular lens(IOL) is recommended for correcting astigmatism.

Clinical Outcomes of Toric Implantable Collamer Lens implantation

PURPOSE: To assess the efficacy of the Toric Implantable Collamer Lens (Toric ICL) to treat moderate to high myopic astigmatism. METHODS: Toric ICL was implanted in 77 eyes of 40 patients with myopia (spherical equivalent [SE] between 3.5 and 18.5 diopters [D]) and astigmatism between 1 and 6 D. The patients were followed up for at least 3 months. Uncorrected visual acuity (UCVA), refraction, best spectacle-corrected visual acuity (BSCVA), adverse events, and postoperative complications were evaluated. RESULTS: At 3months postoperatively, the proportion of eyes with 1.0 or better UCVA (56 eyes out of 77 eyes, 72.7%) was significantly greater than the proportion of eyes with preoperative 1.0 or better BSCVA (38 eyes out of 77 eyes, 49.4%). The mean manifest refractive cylinder dropped from 2.78D (+/-1.05) at baseline to 0.35D (+/-0.34) postoperatively, an 87.4% decrease in astigmatism. Mean manifest refraction SE (MRSE) improved from -9.93D (+/-2.66) preoperatively to 0.15D (+/-0.33) postoperatively. A total of 96.1% of eyes were predicted accurately to within +/-0.75D of predicted MRSE. Mean improvement in BSCVA was 0.79lines; there were no eyes that lost two lines of BSCVA after 3 months postoperatively. CONCLUSIONS: The results support the efficacy and predictability of Toric ICL implantation to treat moderate to high myopic astigmatism.

A Case of High Myopic Astigmatism Corrected with a Toric Intraocular Lens

PURPOSE: To evaluate the effectiveness of the Toric implantable contact lens in correcting high myopic astigmatism. METHODS: A 44-year-old woman's uncorrected visual acuity was 0.08 in the right eye and 0.125 in the left eye. The refractive errors of her eyes were -11.75Dsph. : -5.0Dcyl.axis 3 degrees in the right eye and -1.0Dsph.: -3.0Dcyl.axis 178 degrees in the left eye. Her best corrected visual acuity was 0.5 in the right eye and 1.0 in the left eye. Toric implantable contact lenses were implanted in both eyes without any no intra-operative complications. RESULTS: Six months after surgery, her uncorrected visual acuities were 0.8 in the right eye and 1.0 in the left eye. The refractive errors were -0.5Dsph. : -0.5Dcyl.axis 120 degrees in the right eye and -0.25Dsph. : -1.5Dcyl.axis 13 degrees in the left eye. The best corrected visual acuity was 1.0 in the both eyes. In these eyes, there was no cataract or spike of intraocular pressure. CONCLUSIONS: High myopic astigmatism can be corrected with a one-stop operation to implant toric implantable contact lenes.

A Case of High Myopic Astigmatism Corrected with a Toric Intraocular Lens

PURPOSE: To evaluate the effectiveness of the Toric implantable contact lens in correcting high myopic astigmatism. METHODS: A 44-year-old woman's uncorrected visual acuity was 0.08 in the right eye and 0.125 in the left eye. The refractive errors of her eyes were -11.75Dsph. : -5.0Dcyl.axis 3 degrees in the right eye and -1.0Dsph.: -3.0Dcyl.axis 178 degrees in the left eye. Her best corrected visual acuity was 0.5 in the right eye and 1.0 in the left eye. Toric implantable contact lenses were implanted in both eyes without any no intra-operative complications. RESULTS: Six months after surgery, her uncorrected visual acuities were 0.8 in the right eye and 1.0 in the left eye. The refractive errors were -0.5Dsph. : -0.5Dcyl.axis 120 degrees in the right eye and -0.25Dsph. : -1.5Dcyl.axis 13 degrees in the left eye. The best corrected visual acuity was 1.0 in the both eyes. In these eyes, there was no cataract or spike of intraocular pressure. CONCLUSIONS: High myopic astigmatism can be corrected with a one-stop operation to implant toric implantable contact lenes.