Implantation of Add on Lens for Age Related Macular Degeneration Patients With Low Vision
|The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.|
|ClinicalTrials.gov Identifier: NCT03061682|
Recruitment Status : Unknown
Verified February 2017 by rita ehrlich, Rabin Medical Center.
Recruitment status was: Not yet recruiting
First Posted : February 23, 2017
Last Update Posted : February 23, 2017
Age related macular degeneration (AMD) is the leading cause of vision loss in patients older than 55 years old. AMD can present as dry AMD or wet AMD. In most cases AMD affects both eyes although in many cases it's asymmetrical as far as severity. Some patients require low vision aids to continue their daily life tasks. In the past a few attempts were made to use low vision intraocular lenses with corrective glasses without enough success. In addition telescopic and prismatic lenses were also tried. The difficulties with these lenses included low field of vision, unsatisfactory magnification, complicated surgical technique and high complication rates.
Recently an add on lens was designed for the sulcus for implantation in pseudophakic AMD patients. The add on lens doubles the magnification of the central image dependent on the reading distance and the anatomy of the eye.
The lens is acrylic hydrophobic and designed for implantation in the sulcus either in pseudophakic patients or in addition to an intraocular lens implanted during a routine cataract surgery. The lens is 13 mm wide with 4 symmetric haptics. The lens has 1.5 mm central part of 10 diopters and the rest of the lens has no optical power.
Our purpose is to study implantation of the lenses in AMD patients to improve their reading ability and to improve their daily living.
|Condition or disease||Intervention/treatment||Phase|
|Inclusion Criteria||Device: "Scharioth" macula lens A45sml/A45smy||Not Applicable|
Study design Prospective study on implantation of the add on lenses in AMD patients. The study was approved by Rabin medical center IRB.
Patients will be examined for best corrected visual acuity prior to the surgery at 6 meter and for reading at 40 and 15 cm. Improvement of the reading ability at 15 cm compared to 40 cm will predict the potential for vision improvement with the add on lens.
Before the surgery patients will have a full ophthalmological examination. Patients will have axial length and keratometry examination using the biometry. The lens will be implanted in surgery through a 2.2 mm clear cornea and will be injected and positioned in the sulcus.
Patients will be followed up at 1 day, 1 week, 4 weeks, 4 and 6 months following surgery. During follow up patients will undergo full ophthalmic exam and well as visual acuity both for distance and near.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||20 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Implantation of Add on Lens for Age Related Macular Degeneration Patients With Low Vision|
|Estimated Study Start Date :||March 1, 2017|
|Estimated Primary Completion Date :||January 2019|
|Estimated Study Completion Date :||January 2019|
|Experimental: Add on lens||
Device: "Scharioth" macula lens A45sml/A45smy
Implantation of an add on intraocular lens to low vision patients
- near visual acuity [ Time Frame: last study visit - 6 months post surgery ]