Implantation of Add on Lens for Age Related Macular Degeneration Patients With Low Vision

NCT ID: NCT03061682

Last Updated: 2017-02-23

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-03-01
• Study Completion Date: 2019-01-31

Brief Summary

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.

Detailed Description

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.

Conditions

Inclusion Criteria

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

Add on lens

Group Type: EXPERIMENTAL

"Scharioth" macula lens A45sml/A45smy

Intervention Type: DEVICE

Implantation of an add on intraocular lens to low vision patients

Interventions

"Scharioth" macula lens A45sml/A45smy

Implantation of an add on intraocular lens to low vision patients

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Pseudophakic patients with non-active AMD that complain on near distance reading with a distance visual acuity better than 6/60.

Exclusion Criteria

• Exudative AMD with fluids, advanced glaucoma, advance visual field defects, aphakia, following complicated cataract surgery with PCIOL in the sulcus , phacodonesis, chronic uveitis, rubeosis iridis, central corneal opacity.

• Minimum Eligible Age: 50 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Rabin Medical Center

OTHER

Sponsor Role: lead

Responsible Party

rita ehrlich

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Other Identifiers

0408-15RMC

Identifier Type: -

Identifier Source: org_study_id