Anterior Chamber Changes After Implantable Collamer Lens Implantation in High Myopia Using Pentacam: A Prospective Study

Mohamed Nagy Elmohamady, Walid Abdelghaffar, Mohamed Nagy Elmohamady, Walid Abdelghaffar

Abstract

Introduction: The objective of this study was to evaluate the changes of the anterior chamber (AC) of the eye after implantable Collamer lens (ICL) implantation in high myopia by using the Pentacam.

Methods: The prospective study included 34 high myopic patients (34 eyes). All patients were treated with Visian implantable Collamer lens (ICL) (Staar Surgical Co.) implantation. The Pentacam (Oculus) was used for all cases preoperatively and 1, 3 and 6 months postoperatively. AC angle (ACA), AC volume (ACV), central AC depth (CACD), ICL vault, central corneal thickness (CCT), pupil diameter (PD), K readings and intraocular pressure (IOP) were recorded.

Results: Our study included 34 eyes of 34 patients, 20 females (59%) and 14 males (41%). Mean ACA was 36.93° ± 4.75° preoperatively, 25.17° ± 5.64° and 25.23° ± 6.05° 1 and 3 months postoperatively (p < 0.001). Mean ACV was 191.24 ± 11.18 mm3 preoperatively, 141.53 ± 16.77 and 142.11 ± 15.89 mm3 1 and 3 months postoperatively (p < 0.001). Mean CACD was 3.59 ± 0.17 mm preoperatively, 2.83 ± 0.24 mm and 2.96 ± 0.25 mm 1 and 3 months postoperatively (p < 0.001). The ICL vault decreased from 0.556 ± 0.033 mm 1 month postoperatively to 0.431 ± 0.056 mm 3 months postoperatively (p < 0.001). There were no statistically significant differences for any of the AC parameters among measurements taken 3, 6 and 12 months postoperatively. There were no statistically significant differences between preoperative and any postoperative measurements of CCT, PD and K readings.

Conclusions: ICL implantation for correction of high myopia leads to significant changes in the anterior chamber angle, volume and depth and insignificant changes in the pupil diameter, CCT and K readings.

Keywords: Anterior chamber; Collamer, myopia; ICL; Pentacam.

References

    1. Kamiya K, Shimizu K, Igarashi A, Hikita F, Komatsu M. Four-year follow-up of implantable collamer lens implantation for moderate to high myopia. Arch Ophthalmol. 2009;127:845–850. doi: 10.1001/archophthalmol.2009.67.
    1. Igarashi A, Shimizu K, Kamiya K. Eight-year follow-up of posterior chamber phakic intraocular lens implantation for moderate to high myopia. Am J Ophthalmol. 2014;157(3):532–539. doi: 10.1016/j.ajo.2013.11.006.
    1. Sari ES, Pinero DP, Kubaloglu A, Evcili PS, Koytak A, Kutluturk I, Ozerturk Y. Toric implantable collamer lens for moderate to high myopic astigmatism: 3-year follow-up. Graefes Arch Clin Exp Ophthalmol. 2013;251(5):1413–1422. doi: 10.1007/s00417-012-2172-8.
    1. Lim DH, Lee MG, Chung ES, Chung TY. Clinical results of posterior chamber phakic intraocular lens implantation in eyes with low anterior chamber depth. Am J Ophthalmol. 2014;158(3):447–454. doi: 10.1016/j.ajo.2014.06.005.
    1. Fernandes P, González-Méijome JM, Madrid-Costa D, Ferrer-Blasco T, Jorge J, Montés-Micó R. Implantable collamer posterior chamber intraocular lenses: a review of potential complications. J Refract Surg. 2011;27(10):765–776. doi: 10.3928/1081597X-20110617-01.
    1. Esmaeili A, Barazandeh B, Ahmadi S, Haghi A, Ahmadi Hosseini SM, Abolbashari F. Assessment of the anterior chamber parameters after laser iridotomy in primary angle close suspect using Pentacam and gonioscopy. Int J Ophthalmol. 2013;6:680–684.
    1. Ju Y, Gao X-W, Ren B. Posterior chamber phakic intraocular lens implantation for high myopia. Int J Ophthalmol. 2013;6(6):831–835.
    1. Zhang J, Luo H, Zhang J, Yu K. Comparison of anterior section parameters using anterior segment optical coherence tomography and ultrasound biomicroscopy in myopic patients after ICL implantation. Int J Ophthalmol. 2016;9(1):58–62.
    1. Chen X, Miao H, Naidu RK, Wang X, Zhou X. Comparison of early changes in and factors affecting vault following posterior chamber phakic implantable collamer lens implantation without and with a central hole (ICL V4 and ICL V4c) BMC Ophthalmol. 2016;16(1):161. doi: 10.1186/s12886-016-0336-8.
    1. Chung SC, Park MO, Lee K, Ahn ES. Chung. Changes in iridocorneal angle structure and trabecular pigmentation with STAAR implantable collamer lens during 2 years. J Refract Surg. 2009;25(3):251–258.
    1. Fernández-Vigo JI, Macarro-Merino A, Fernández-Vigo C, et al. Effects of implantable Collamer lens V4c placement on iridocorneal angle measurements by Fourier-domain optical coherence tomography. Am J Ophthalmol. 2016;162(43–52):e1.
    1. Ju Y, Gao X-W, Ren B. Posterior chamber phakic intraocular lens implantation for high myopia. Int J Ophthalmol. 2013;6(6):831–835.
    1. Li D, Yang Y, Su C, Yin H, Liu X. Pupil diameter changes in high myopes after collamer lens implantation. Optom Vis Sci. 2015;92(12):1161–1169. doi: 10.1097/OPX.0000000000000723.
    1. Chun YS, Park IK, Lee HI, Lee JH, Kim JC. Iris and trabecular meshwork pigment changes after posterior chamber phakic intraocular lens implantation. J Cataract Refract Surg. 2006;32:1452–1458. doi: 10.1016/j.jcrs.2006.04.023.
    1. Almalki S, Abubaker A, Alsabaani NA, Edward DP. Causes of elevated intraocular pressure following implantation of phakic intraocular lenses for myopia. Int Ophthalmol. 2016;36:259–265. doi: 10.1007/s10792-015-0112-4.

Source: PubMed

Sponsors and Collaborators

Medical Conditions

Drug Interventions

3
Subscribe