Characteristics and Risk Ratios of Late Intraocular Lens (IOL) Complication

NCT ID: NCT02747667

Last Updated: 2016-04-22

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 10125 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2014-06-30
• Study Completion Date: 2016-01-31

Brief Summary

Late in-the-bag intraocular lens (IOL) dislocation occurs up to 30 years after cataract surgery and the prevalence ranges from 0.1% to 3.0%. Before the introduction of the continuous curvilinear capsulorhexis, late dislocation was very uncommon but since then several case reports and case series were observed. In-the-bag IOL dislocation is a well-known postoperative complication, especially in eyes with weak zonules as seen in pseudoexfoliation syndrome (PXF), high axial myopia, uveitis and retinitis pigmentosa (RP).

In this retrospective study, medical records of all patients with IOL related problems after implantation of one hydrophilic acrylic single-piece lens at the Department of Ophthalmology Graz, Medical University Graz, Styria, Austria are reviewed. Characteristics and predisposing factors for late in-the-bag, out-of-the-bag IOL dislocations, and haptic complications will be investigated and compared amongst each other or control patients. Incidence rates for each IOL complication will be calculated. For in-the-bag dislocations odds ratios for each predisposing factor will be calculated.

Detailed Description

This is a retrospective cohort study. Data of all patients treated at the hospital from June 1997 to October 2015 for a complication after IOL implantation will be obtained from an electronic medical record and database (FileMaker Inc., v3 - 6 and EyMed). Additional data, e.g. axial length (AL) or diopters of the implanted IOL, are taken from the patients' medical files. Collected data are age, sex, laterality of the eye, and predisposing eye conditions (PXF, relevant myopia defined as ≥ 25.5 mm axial length, uveitis, RP and ocular trauma). Other parameters are preoperative surgical interventions, the use of a capsular tension ring (CTR), perioperative complications, diopters of the IOL, pre- and postoperative corrected distance visual acuity (CDVA) in logMAR, and post-operative manifest refraction. Time to dislocation, additional interventions after cataract surgery, and symptoms due to the IOL complication will recorded. Type of dislocation (in-the-bag or out-of-the-bag), location (anterior chamber, pupillary plane or vitreous), pre- and post-operative CDVA, pre- and post-operative manifest refraction, type of secondary intervention, and in case secondary implantation was performed, type of secondary IOL are collected.

Differences regarding prevalence for various predisposing risk factors are investigated by means of logistic regression methods. Odds ratios and 95% confidence intervals are calculated unadjusted as well as adjusted for age, gender, and the four predisposing risk factors: PXF, relevant myopia, uveitis, and RP. Prevalence and incidence of in-the-bag IOL dislocations will be calculated from all patients that had an implantation of the ACR6D SE at the Department of Ophthalmology in Graz.

Conditions

Complications

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: RETROSPECTIVE

Study Groups

Eye with late IOL complication

Alle patients with IOL complication (subgroup: in-the-bag dislocation; out-of-the-bag dislocation; haptic dislocation)

No interventions assigned to this group

Eyes with no late IOl complication

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• Phacoemulsification or extracapsular cataract extraction with the hydrophilic acrylic IOL ACR6D SE at the Department of Ophthalmology Graz in Styria, Austria.

Exclusion Criteria

• Intracapsular cataract extraction

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Vienna Institute for Research in Ocular Surgery

OTHER

Sponsor Role: collaborator

Medical University of Graz

OTHER

Sponsor Role: lead

Responsible Party

Mayer Christoph, MD

MD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Christoph F Mayer, MD

Role: PRINCIPAL_INVESTIGATOR

Medical University of Graz

Other Identifiers

26-066 ex 13/14

Identifier Type: -

Identifier Source: org_study_id