An observational study in Cataract, sponsored by Yonsei University. Completed. Open to participants aged 40 Years to 79 Years. Per ClinicalTrials.gov, last updated 2014-07-08.
Sponsored by Yonsei University · Observational
This study was set up to identify clinical outcomes including a refractive shift or change in IOL calculation accuracy and optical quality after Ophtec® capsular tension ring in the eyes without zonular instability.
1,701 studies on the registry are indexed under Cataract; 230 are open to participants now.
This study's enrollment of 52 is below the median of 81 across 484 observational studies indexed under Cataract.
Browse Cataract studies →Yonsei University is the lead sponsor of 1,387 studies on the registry; 232 are open to participants now.
Counted across the registry records on this site, refreshed daily.
The patients who were planned to undergo the cataract surgery in Department of Ophthalmology, Yonsei University College of Medicine
Exclusion Criteria:
The patients who had same cataract surgery procedure without CTR insertion
The patients who underwent capsular tension ring insertion just before IOL implantation during cataract surgery
Device: Insertion of the capsular tension ring
Also known as: a pre-loaded CTR in single use injector was inserted just before IOL implantation during cataract surgery
Best corrected visual acuity
Visual acuity measurement using refractive error correction
Time frame: 1 month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
refractive error
Autokeratometry (KR-7100; Topcon, Tokyo, Japan) and manifested refraction were performed to examine refractive errors
Time frame: 1 month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
Anterior chamber depth
obtained with a Scheimpflug imaging system (Pentacam; OCULUS Optikgeräte GmbH, Wetzlar, Germany)
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
Ocular aberrations
measured using the ray-tracing aberrometer (iTrace, Tracey Technologies, Houston, TX, USA) at a pupil size of 5 mm in mesopic conditions, without pharmacologic dilatation
Time frame: 1month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
constrast sensitivity
measured at five spatial frequencies (1.5, 3, 6, 12, and 18 Hz) using the Optec 6500 vision testing system
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
posterior capsular opacity grades
graded after dilation of pupil over 6 mm, based on slit lamp examination findings
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
Best corrected visual acuity
Visual acuity measurement using refractive error correction
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
refractive error
Autokeratometry (KR-7100; Topcon, Tokyo, Japan) and manifested refraction were performed to examine refractive errors
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
Ocular aberrations
measured using the ray-tracing aberrometer (iTrace, Tracey Technologies, Houston, TX, USA) at a pupil size of 5 mm in mesopic conditions, without pharmacologic dilatation
Time frame: 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring
No study locations are listed for this record.
This study is completed, as verified in Jun 2014. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Yonsei University