Low-add Multifocal vs. Monofocal IOLs
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|ClinicalTrials.gov Identifier: NCT03749161|
Recruitment Status : Recruiting
First Posted : November 21, 2018
Last Update Posted : November 21, 2018
|Condition or disease||Intervention/treatment||Phase|
|Cataract||Device: Low-add multifocal IOL Device: Monofocal IOL||Not Applicable|
Spectacle independence is one of the main aims in modern cataract surgery. Although bilateral monofocal IOL implantation, aiming for emmetropia or low myopia, leads to high levels of patient satisfaction in distance vision, spectacle dependence for intermediate vision, reading and other near vision tasks is the usual result.
There are different techniques to reduce spectacle dependence, the most common one is the use of multifocal IOLs. However, a variable number of patients complain of problems, such as glare or haloes (positive dysphotopsia symptoms). Dysphotopsia symptoms may vary significantly from patient to patient. The real incidence of dysphotopsia like symptoms after cataract surgery and multifocal IOL is unknown and the implantation of multifocal IOLs is a commonly accepted contraindication in patients who are night drivers. Another characteristic of many multifocal IOLs is that it can provide patients with excellent near and distance vision but lack in the intermediate range.
One option to enhance intermediate vision and to leave patients with good contrast sensitivity is the use of low-add multifocal IOLs. These IOLs are adequate to expectations a lot of patients have, who were used to have a good distance vision and who were wearing spectacles when performing near vision tasks before surgery. Many of these patients would prefer to keep their reading spectacles after surgery and ideally would like to function well at distance and intermediate (60 to 80 cm - computer distance, household work…) range without glasses.
One example of these low-add multifocal IOLs is the LENTIS Comfort MF15 with a near add of 1.50D (on IOL plane). Its single, blended transition zone works to deliver patients the same kind of distance vision as a monofocal IOL with the addition of enhanced intermediate vision. In particular, this design provides improved vision at a distance of 60 cm and more. Additional key features of the Comfort IOL include good contrast sensitivity for twilight vision, optimized depth of focus, and natural imaging quality and color sensitivity. Especially this type of IOL may lead to more tolerance of postoperative refractive errors due to biometry and IOL power calculation imprecision. This should result in better unaided distance vision and therefore higher patient satisfaction after cataract surgery.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||50 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Triple (Participant, Investigator, Outcomes Assessor)|
|Official Title:||Comparison Between Bilateral Low-add Multifocal Intraocular Lenses and Monofocal Intraocular Lenses: A Randomised Trial|
|Actual Study Start Date :||April 1, 2018|
|Estimated Primary Completion Date :||December 1, 2019|
|Estimated Study Completion Date :||January 1, 2020|
Experimental: Lentis comfort
Patient will receive the low-add multifocal IOL during cataract surgery
Device: Low-add multifocal IOL
Lentis comfort, low-add multifocal, IOL
Experimental: Lentis L-313
Patient will receive the monofocal IOL Lentis L-313 during cataract surgery
Device: Monofocal IOL
Lentis L-313, monofocal IOL
- Spectacle independence questionnaire [ Time Frame: 12 months ]Spectacle independence will be assessed using a questionnaire. In this questionnaire the patient will be asked about usage of spectacles for far, near and intermediate distance. Best result will be if the patient is independent from any spectacles in the different distances.
- Best Corrected Distance Visual Acuity and Uncorrected Intermediate Visual Acuity [ Time Frame: 12 months ]Best corrected distance and uncorrected intermediate visual acuity will be assessed using the ETDRS charts
- Titmus Fly Stereo test [ Time Frame: 12 months ]Stereo Vision assessment will be done using the Titmus Fly Stereo test. The patients will be asked to detect stereoscopic objects of different difficulty levels. The result will be better, the more correct stereoscopic objects the patient will detect.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03749161
|Contact: John Falasinnu, MD||01 / 91021 / firstname.lastname@example.org|
|Contact: Nino Hirnschall, MD||01 / 91021 / email@example.com|