Cataract
Conditions
Brief summary
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.
Interventions
DEVICEInsertion of the capsular tension ring
Sponsors
Yonsei University
Study design
Observational model
CASE_CONTROL
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
40 Years to 79 Years
Healthy volunteers
No
Inclusion criteria
1. age between 40 and 79 years 2. no history of eye surgery or glaucoma 3. a transparent central cornea 4. pupil dilation at the preoperative examination of at least 6.0 mm 5. absence of biomicroscopic signs of pseudoexfoliation 6. normal fundus examination
Exclusion criteria
1. presence of ocular disease that might affect the visual outcome (e.g., color vision disturbance, chronic uveitis) 2. presence of ocular disease that might affect contrast sensitivity function (e.g., glaucoma, maculopathy, high myopia)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Best corrected visual acuity | 1 month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | Visual acuity measurement using refractive error correction |
| refractive error | 1 month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | Autokeratometry (KR-7100; Topcon, Tokyo, Japan) and manifested refraction were performed to examine refractive errors |
| Anterior chamber depth | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | obtained with a Scheimpflug imaging system (Pentacam; OCULUS Optikgeräte GmbH, Wetzlar, Germany) |
| Ocular aberrations | 1month after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | 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 |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| constrast sensitivity | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | measured at five spatial frequencies (1.5, 3, 6, 12, and 18 Hz) using the Optec 6500 vision testing system |
| Ocular aberrations | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | 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 |
| posterior capsular opacity grades | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | graded after dilation of pupil over 6 mm, based on slit lamp examination findings |
| Best corrected visual acuity | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | Visual acuity measurement using refractive error correction |
| refractive error | 3 months after capsular tension ring and intraocular lens implantation (cataract surgery) using capsular tension ring | Autokeratometry (KR-7100; Topcon, Tokyo, Japan) and manifested refraction were performed to examine refractive errors |
Outcome results
None listed