Assessment of Visual Function and Optics in Intraocular Lenses
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Purpose
The main objective of this research is to assess visual function and optical performance of CE marked, implanted intraocular lenses to understand the individual factors that affect their performance and how these may be improved in future designs and to evaluate measurement techniques.
All outcome measures will be captured 3-6 months after surgery
| Condition | Intervention | Phase |
|---|---|---|
|
Cataract |
Procedure: Monofocal IOL Procedure: Multifocal IOL Procedure: Toric IOL |
Phase 4 |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Endpoint Classification: Efficacy Study Intervention Model: Parallel Assignment Masking: Single Blind (Investigator) Primary Purpose: Treatment |
| Official Title: | Evaluating Subjective and Objective Performance of Instrumentation Used and Devices Implanted in Cataract Surgery |
- Unaided distance and near vision [ Time Frame: Measured at 3-6 months after surgery ] [ Designated as safety issue: No ]Visual Acuity (logMAR)
- Patient Satisfaction [ Time Frame: Measured at 3-6 months after surgery ] [ Designated as safety issue: No ]NAVQ score
- Residual refraction [ Time Frame: Measured at 3-6 months after surgery ] [ Designated as safety issue: No ]Autorefraction / subjective refraction
- Aberrations [ Time Frame: Measured at 3-6 months after surgery ] [ Designated as safety issue: No ]Aberrometry
- Corrected distance and near acuity [ Time Frame: Measured at 3-6 months after surgery ] [ Designated as safety issue: No ]Acuity (logMAR)
| Estimated Enrollment: | 500 |
| Study Start Date: | September 2012 |
| Estimated Study Completion Date: | October 2015 |
| Estimated Primary Completion Date: | October 2015 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Placebo Comparator: Monofocal
Monofocal IOL Implant Manufacturers of IOLs used as monofocal comparator are Alcon, AMO, Bausch and Lomb, Lenstec, Oculentis, Ophthec, Physiol and Zeiss |
Procedure: Monofocal IOL
Monofocal Intraocular lens will be implanted
Other Name: Alcon AMO B&L Lenstec Oculentis Ophthec Physiol & Zeiss
|
|
Experimental: Multifocal
Multifocal IOL Manufacturers of multifocal IOLs under investigation are Alcon, AMO, Bausch and Lomb, Lenstec, Oculentis, Ophthec, Physiol and Zeiss |
Procedure: Multifocal IOL
Multifocal IOL will be implanted
|
|
Experimental: Toric
Toric IOL Manufacturers of toric IOLs under investigation are Alcon, AMO, Bausch and Lomb, Lenstec, Oculentis, Ophthec, Physiol and Zeiss |
Procedure: Toric IOL
Toric IOLS will be implanted
|
Detailed Description:
A cataract occurs when the natural lens of the eye, which plays a major role in the focusing of light and production of sharp visual images, becomes cloudy and hardens, resulting in a loss of visual function. Left untreated, cataracts can cause preventable blindness. During cataract surgery the natural lens is removed and a man-made intraocular lens (IOL) is implanted in its place.
IOL technology has advanced significantly in recent years and as a result the main goal of cataract surgery is no longer simply the successful removal of the cloudy lens and restoration of vision. Providing patients with the best possible refractive outcome and the best possible visual quality is now much more important when assessing surgery outcomes.
Aspheric, multifocal and accommodating IOLs are among the new designs developed to improve visual outcome after cataract surgery. In order to assess the effectiveness of these designs, visual function needs to be evaluated both objectively and subjectively following their implantation. Such evaluation allows the continued evolution of these IOL designs towards optimum. This proposed research study, which aims to assess the visual function and optical performance of new CE marked IOLs after implantation, could significantly contribute to the enhancement and development of improved IOL designs in the future.
We have successfully conducted similar patient trials for the past 5 years. As new IOL designs are constantly being developed, approved and CE marked, this type of research study will always have the potential to offer new information that is not currently available and has not previously been assessed or published and could contribute towards improved IOL designs in the future.
All outcome measures will be captured 3-6 months after surgery
Eligibility| Ages Eligible for Study: | 40 Years to 85 Years |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Subjects age between 40-85 years, may be either male or female, and may be of any race (as cataracts rarely occur before the age of 40 and above 85 other ocular pathology is common).
- Subjects requiring cataract surgery.
- Potential for best corrected visual acuity of 6/12 or better (as visual function in these patients will be affected by ocular pathology).
- Subjects with clear intraocular media other than cataract (as assessing cataract).
- General physical and mental condition allowing participation in current study.
- Subjects willing to participate as evidenced by signing the written informed
Exclusion Criteria:
- Prior surgery on the selected eye
- Previous uveitis or trauma to the selected eye, anterior or posterior synechiae
- Potential for best corrected visual acuity worse than 6/12 (since this may indicate other causes of ocular pathology)
- Partial or total paralysis, Parkinsons syndrome, cerebrovascular accident or other condition that could impact on the results of the study
- Subject over 85 years of age (ocular pathology more common in this age group)
- Subjects without adequate physical and mental capacity to enable participation in the study
- Subject unwilling to participate
- Systemic or topical medication known to influence visual function measures
Contacts and Locations| Contact: James S Wolffsohn, PhD | +44(0)121 2044140 ext x | j.s.w.wolffsohn@aston.ac.uk |
| United Kingdom | |
| Birmingham Midland Eye Centre | Not yet recruiting |
| Birmingham, West Midlands, United Kingdom, B18 7QH | |
| Contact: Sunil Shah, FRCS +44(0)1215076801 ext x sunil.shah@doctors.org.uk | |
| Principal Investigator: Sunil Shah, FRCS | |
| Principal Investigator: | Sunil Shah, FRCS | Birmingham Midland Eye Centre |
More Information
No publications provided
| Responsible Party: | Aston University |
| ClinicalTrials.gov Identifier: | NCT01654159 History of Changes |
| Other Study ID Numbers: | IOL2012 |
| Study First Received: | July 17, 2012 |
| Last Updated: | July 30, 2012 |
| Health Authority: | United Kingdom: Research Ethics Committee |
Keywords provided by Aston University:
|
intraocular lenses evaluation cataract |
Additional relevant MeSH terms:
|
Cataract Lens Diseases Eye Diseases |
ClinicalTrials.gov processed this record on June 18, 2013