Implantation of Add on Lens for Age Related Macular Degeneration Patients With Low Vision
试验速览
- 阶段
- 不适用
- 入组人数
- 20
- 主要终点
- near visual acuity
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 50 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Pseudophakic patients with non-active AMD that complain on near distance reading with a distance visual acuity better than 6/60.
排除标准
- •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.
结局指标
主要结局
near visual acuity
时间窗: last study visit - 6 months post surgery
次要结局
未报告次要终点
研究者
rita ehrlich
Principal Investigator
Rabin Medical Center