- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04972435
Effect of Multifocal Intraocular Lens on Contrast Sensitivity in Primary Angle-Closure Patients
Study Overview
Status
Intervention / Treatment
Detailed Description
This prospective non-randomized clinical study was conducted at the Department of Ophthalmology of the Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand during January 2014 to December 2015. The study protocol and informed consent procedures were both approved by our center's institutional review board (IRB) (approval number Si 384/2014). Each patient provided written informed consent prior to participation.
Primary angle closure was defined as an eye with invisible non-pigmented trabecular meshwork greater than 180 degrees and evidence of peripheral anterior synechiae on gonioscopy without glaucomatous optic disc appearance, glaucomatous pattern visual field damage, or history of increased IOP. Primary angle closure glaucoma was defined as an eye with invisible non-pigmented trabecular meshwork greater than 180 degrees on gonioscopy with glaucomatous optic damage (cup-to-disc ratio greater than 0.5 and/or localized neuro-retinal rim defect) and history of increased IOP raising. Patients with PACG must have been under good disease control, which was defined as IOP under 20 mmHg with 1 to 3 topical anti-glaucoma medications without deterioration of visual field, except generalized depression from cataract. Intra-ocular lens calculation was performed at the baseline visit using IOL Master. All patients received information about the advantages and disadvantages of MIOLs (Tecnis ZMB00 or Acrysof IQ Restore SN6AD1) and of mIOLs (Tecnis ZCB00 or Acrysof IQ SN60WF) before choosing the type of IOL that they individually preferred. Cataract surgery was performed by a single surgeon. Topical anesthesia was applied before standard phacoemulsification (2.2 mm temporal clear cornea incision and continuous curvilinear capsulorhexis) and IOL implantation into the capsular bag. Eyes with any intraoperative or postoperative complication were excluded.
Data specific to uncorrected and best-corrected distant visual acuities (UCVA and BCVA) in logMar, auto-refraction, slit-lamp ophthalmoscopic examination, intraocular pressure (IOP) measurement with Goldmann applanation tonometry, contrast sensitivity (CS), anterior chamber depth (ACD), central corneal thickness (CCT), and axial length (AL) were collected on the preoperative screening day, and at the 2 to 6-month postoperative follow-up. CS was measured under normal room light (photopic) conditions to evaluate patient quality of vision during the performance of their daily activities using a Functional Vision Analyzer. This test produces sine-wave gratings of different spatial frequencies. The absolute values of distance CS were obtained at five spatial frequencies (1.5, 3, 6, 12, and 18 cycles per degree; CPD). Visante® AS-OCT was used to determine CCT and ACD. ACD was defined as the distance between the corneal endothelium and the anterior surface of the crystalline lens (preoperative) or iris plane (postoperative). Axial length was obtained using IOL Master.
Comparisons of continuous data with normal distribution were made using Student's t-test for unpaired data, and using Mann-Whitney U test for non-normally distributed data. A p-value of less than 0.05 was defined as denoting statistical significance.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Bangkok
-
Bangkoknoi, Bangkok, Thailand, 10700
- Naris Kitnarong
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Visually significant cataract patients aged >18 years with PAC or PACG who underwent prophylaxis peripheral iridotomy at least 2 months prior to participation.
Exclusion Criteria:
- Patients with preexisting glaucomatous visual field defect, except generalized depression
- Any other concurrent ocular diseases that could affect visual acuity, except cataract
- History of ocular inflammation or ocular surgery, except laser peripheral iridotomy, which is a routine procedure for treating PAC/PACG
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Multifocal intraocular lens group
Cataract patients with PAC or PACG who underwent phacoemulsification with multifocal intraocular lens implantation.
|
All subjects performed the contrast sensitivity measurement preoperatively and one time at 2 months postoperatively.
|
SHAM_COMPARATOR: Monofocal intraocular lens group
Cataract patients with PAC or PACG who underwent phacoemulsification with monofocal intraocular lens implantation which are the standard IOL.
|
All subjects performed the contrast sensitivity measurement preoperatively and one time at 2 months postoperatively.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Contrast sensitivity
Time Frame: Preoperative (on screening day)
|
Contrast sensitivity at partial frequency 1.5, 3.0, 6.0, 12.0, and 18.0 cycles per degree (CPD)
|
Preoperative (on screening day)
|
Contrast sensitivity
Time Frame: At 2nd month postoperatively
|
Contrast sensitivity at partial frequency 1.5, 3.0, 6.0, 12.0, and 18.0 cycles per degree (CPD)
|
At 2nd month postoperatively
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Visual acuity
Time Frame: Preoperative (on screening day)
|
Visual acuity at distance in LogMar
|
Preoperative (on screening day)
|
Visual acuity
Time Frame: At 2nd month postoperatively
|
Visual acuity at distance in LogMar
|
At 2nd month postoperatively
|
Anterior chamber depth
Time Frame: Preoperative (on screening day)
|
Anterior chamber depth
|
Preoperative (on screening day)
|
Anterior chamber depth
Time Frame: At 2nd month postoperatively
|
Anterior chamber depth
|
At 2nd month postoperatively
|
Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Kumar BV, Phillips RP, Prasad S. Multifocal intraocular lenses in the setting of glaucoma. Curr Opin Ophthalmol. 2007 Feb;18(1):62-6. doi: 10.1097/ICU.0b013e328011d108.
- Teichman JC, Ahmed II. Intraocular lens choices for patients with glaucoma. Curr Opin Ophthalmol. 2010 Mar;21(2):135-43. doi: 10.1097/ICU.0b013e3283365154.
- Kim CY, Chung SH, Kim TI, Cho YJ, Yoon G, Seo KY. Comparison of higher-order aberration and contrast sensitivity in monofocal and multifocal intraocular lenses. Yonsei Med J. 2007 Aug 31;48(4):627-33. doi: 10.3349/ymj.2007.48.4.627.
- Montes-Mico R, Alio JL. Distance and near contrast sensitivity function after multifocal intraocular lens implantation. J Cataract Refract Surg. 2003 Apr;29(4):703-11. doi: 10.1016/s0886-3350(02)01648-6.
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- Naris001
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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