Clinical trial NCT04624035: Implantable Phakic Lens (IPCL) VS Implantable Collamer Lens
Official title: Comparison Between Implantable Phakic Intraocular Lens and Implantable Collamer Lens in Treatment of Myopia in Adults
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Myopia
Lead sponsor: Assiut University
Sponsor class: OTHER
First posted: 2020-11-10
Enrollment: 60
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Phakic intraocular lenses (pIOL) of different designs and materials have been used effectively instead of corneal refractive surgery in certain situations. The pIOL exhibits a number of advantages over corneal techniques as it is suitable for high myopes, with lower production of aberrations, and superior contrast sensitivity. Keeping the accommodation is its definite lead over refractive lens exchange. The Visian implantable collamer lens (ICL; Staar Surgical, Monrovia, CA), a posterior chamber pIOL, has been stated to be useful for the correction of high myopia. Nevertheless, as an intraocular procedure, it is associated with a risk of complications as probable injury to anterior segment, retinal detachment and endophthalmitis.

The Implantable Phakic Contact Lens (IPCL V2, Caregroup Sight Solutions, India) has been developed as an alternative for the ICL, at a noticeable financial advantage. Furthermore, the highestmyopic correction which is instantly accessible with ICL is -18.0 D. Meanwhile, IPCL can provide correction higher degrees up to -30.0 D.

Former researches have been made to assess the safety and efficiency of ICL implantation, to evaluate various devices for anterior segment imaging postoperatively and to identify changes in anterior segment after surgery. A recent study determined the safety of the IPCL over a minimum follow-up period of one year. In this work the investigators aimed to compare the refractive results and the adverse effects of the IPCL and the ICL in treatment of myopia in adults.


Eligibility criteria: Inclusion Criteria:

* myopia of more than 6 diopter
* central anterior chamber depth more than 2.8 mm

Exclusion Criteria:

* unstable refraction
* any other ocular disease
* any systemic disease

Primary outcomes:
measure: Refractive outcome
timeFrame: 12 months
measure: Visual outcome
timeFrame: 12 months
Secondary outcomes:
measure: Adverse reactions
timeFrame: 12 months
Other outcomes:
Locations:
city: Asyut
country: Egypt
facility: Tiba eye center
city: Banhā
country: Egypt
facility: Al Masa eye center
Study officials:
affiliation: Assiut University
name: Mahmoud F Rateb, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Stulting RD, John ME, Maloney RK, Assil KK, Arrowsmith PN, Thompson VM; U.S. Verisyse Study Group. Three-year results of Artisan/Verisyse phakic intraocular lens implantation. Results of the United States Food And Drug Administration clinical trial. Ophthalmology. 2008 Mar;115(3):464-472.e1. doi: 10.1016/j.ophtha.2007.08.039. Epub 2007 Nov 26.
citation: Kamiya K, Igarashi A, Shimizu K, Matsumura K, Komatsu M. Visual performance after posterior chamber phakic intraocular lens implantation and wavefront-guided laser in situ keratomileusis for low to moderate myopia. Am J Ophthalmol. 2012 Jun;153(6):1178-86.e1. doi: 10.1016/j.ajo.2011.12.005. Epub 2012 Feb 23.
citation: Sanders D, Vukich JA. Comparison of implantable collamer lens (ICL) and laser-assisted in situ keratomileusis (LASIK) for low myopia. Cornea. 2006 Dec;25(10):1139-46. doi: 10.1097/ICO.0b013e31802cbf3c.
citation: Igarashi A, Kamiya K, Shimizu K, Komatsu M. Visual performance after implantable collamer lens implantation and wavefront-guided laser in situ keratomileusis for high myopia. Am J Ophthalmol. 2009 Jul;148(1):164-70.e1. doi: 10.1016/j.ajo.2009.02.001. Epub 2009 Apr 17.
citation: Pineda-Fernandez A, Jaramillo J, Vargas J, Jaramillo M, Jaramillo J, Galindez A. Phakic posterior chamber intraocular lens for high myopia. J Cataract Refract Surg. 2004 Nov;30(11):2277-83. doi: 10.1016/j.jcrs.2004.03.035.
citation: Elmohamady MN, Abdelghaffar W. Anterior Chamber Changes After Implantable Collamer Lens Implantation in High Myopia Using Pentacam: A Prospective Study. Ophthalmol Ther. 2017 Dec;6(2):343-349. doi: 10.1007/s40123-017-0109-3. Epub 2017 Sep 20.
citation: Fernandes P, Gonzalez-Meijome JM, Madrid-Costa D, Ferrer-Blasco T, Jorge J, Montes-Mico R. Implantable collamer posterior chamber intraocular lenses: a review of potential complications. J Refract Surg. 2011 Oct;27(10):765-76. doi: 10.3928/1081597X-20110617-01. Epub 2011 Jun 30.
citation: Sachdev G, Ramamurthy D. Long-term safety of posterior chamber implantable phakic contact lens for the correction of myopia. Clin Ophthalmol. 2019 Jan 7;13:137-142. doi: 10.2147/OPTH.S185304. eCollection 2019.
citation: Zhang J, Luo HH, Zhuang J, Yu KM. Comparison of anterior section parameters using anterior segment optical coherence tomography and ultrasound biomicroscopy in myopic patients after ICL implantation. Int J Ophthalmol. 2016 Jan 18;9(1):58-62. doi: 10.18240/ijo.2016.01.10. eCollection 2016.
citation: Rateb M, Gad AAM, Tohamy D, Elmohamady MN. A Prospective Comparative Study between Implantable Phakic Intraocular Contact Lens and Implantable Collamer Lens in Treatment of Myopia in Adults. J Ophthalmol. 2022 Mar 28;2022:9212253. doi: 10.1155/2022/9212253. eCollection 2022.