Clinical Outcomes of Patients Bilaterally Implanted With the TECNIS® Symfony or TECNIS® Symfony Toric Extended Range of Vision IOL
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 96
- 试验地点
- 2
- 主要终点
- Visual outcome
研究概览
简要总结
In With increased patients' demand for a spectacle-free lifestyle and technological advancements, cataract surgery with multifocal intraocular lens (IOL) implantation has become an effective solution for correcting presbyopia in patients who want to maintain their full range of vision.
Conventional bifocal IOLs used either refractive or diffractive optics to split the light and create 2 principal focal points, thus providing functional vision at distance and near. This simultaneous imaging principle produces a sharp image that is overlaid by a secondary blurred out-of focus image, so these IOLs inherently produce a deterioration in contrast sensitivity and unwanted photic phenomena such as glare and halos. Additionally, studies reported insufficient intermediate vision with bifocal IOLs.
There is an increasing desire for spectacle independence at intermediate distance, especially due to the increased use of computers and smartphones. Trifocal IOLs were introduced to the market in 2010 and participants provide an additional, third focal point to improve intermediate vision without compromising distance and near vision. However, participants are still vulnerable to decreased contrast sensitivity and photic phenomena due to the IOL's mechanism of splitting the light into discrete focal points.
An extended depth of focus (EDOF) technology was recently introduced with the aim to improve intermediate vision while maintaining image contrast. The diffractive echelette design, embedded on its posterior optical surface, extends the range of vision and the achromatic technology reduces corneal chromatic aberrations to enhance retinal image quality and improve contrast sensitivity. The elongated focus allows imaging in a continuous range of vision without overlapping near and far images, and therefore theoretically would provide a more consistent distance and intermediate vision with less dysphotopsia.
The aim of this study was to investigate the clinical outcome of patients bilaterally implanted with either Tecnis Symfony or Tecnis Symfony toric extended range of vision IOLs (Johnson & Johnson Vision, Santa Ana, CA, USA) in terms of visual performance at different distances, spectacle independence, photic phenomena, and patient satisfaction.
详细描述
Enrollment period : 18 months after IRB approval Participants : Patients who had uncomplicated cataract surgery with binocular implantation of either Symfony (ZXR00) or Symfony toric (ZXT) IOLs.
Methods: The postoperative examinations were performed at 4-8 weeks, and 4-6 months postoperatively. Binocular corrected (CDVA) and uncorrected (UDVA) distance visual acuity was assessed at 4 m using a Snellen chart. Binocular uncorrected intermediate visual acuity (UIVA) at 70 cm and binocular uncorrected near visual acuity (UNVA) at 40 cm were assessed using the Rosenbaum near vision card.
A subjective questionnaire on spectacle use, photic phenomena, and satisfaction was administered to all patients. Patients were asked how often (never, occasionally, 50% of the time, frequently) participants wear spectacles for near, intermediate, and distance activities. Non-directed and directed questions were used with regard to visual symptoms. Photic phenomena (halos, glare and starbursts) were graded as none, trace, mild, moderate, or severe. Patients were asked to rate their level of satisfaction with distance, intermediate, and near vision on a scale from 0 (completely dissatisfied) to 10 (completely satisfied). Additionally, participants were asked whether participants would choose the same IOL again and if participants would recommend the IOL to their friends and family. Surgeons were also asked to rate their level of satisfaction on a scale from 0 to 10 in terms of the ease of manipulation and implantation of the IOL and the visual performance of the IOL.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 20 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age of 20 years or older
排除标准
- •Keratoconus
- •Previous corneal or refractive surgery
- •Chronic or recurrent uveitis
- •Acute ocular disease
- •Previous ocular surgeries
- •Any ocular disease which could possible affect the postoperative visual acuity
研究组 & 干预措施
Symfony group
The subjects who underwent cataract surgery with binocular implantation of either Symfony or Symfony toric IOLs
干预措施: Cataract surgery with binocular implantation of either Symfony (ZXR00) or Symfony toric (ZXT) IOLs (Procedure)
结局指标
主要结局
Visual outcome
时间窗: preoperative 4-6 months
1. Uncorrected Distance Vision Acuity (4 meters) in logMAR scale at each time point.
次要结局
- Patient Satisfaction(Postoperative 4-6 months)
- Spectacle use(Postoperative 4-6 months)
- Photic phenomena(Postoperative 4-6 months)