Electro-optic adaptive eyeglass for correction of presbyopia

矫正老花眼的电光自适应眼镜

• 批准号: 8278640
• 负责人: Guoqiang Li
• 金额: $ 36.48万
• 依托单位: OHIO STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8278640
• 关键词: Adopted; Area; Astigmatism; Automobile Driving; Boxing; Caliber; Caring; Clinical Research; Computers; Contact Lenses; Contrast Sensitivity; Devices; Distant; Dizziness; Electronics; Elements; Eye; Eyeglasses; Feedback; Goals; Human; Intraocular lens implant device; Light; Manuals; Measures; Methods; Mono-S; Myopia; Ophthalmologist; Optics; Patients; Performance; Phase; Population; Presbyopia; Quality of life; Reaction Time; Reading; Refractive Errors; Research; Scanning; System; Techniques; Time; Vision; Visual Acuity; Visual impairment; abstracting; adaptive optics; age related; bioimaging; cost; cost effective; design; gaze; improved; lens; light weight; liquid crystal; meetings; novel; novel strategies; operation; practical application; prototype; simulation; visual performance; voltage

Electro-optic adaptive eyeglass for correction of presbyopia Abstract Presbyopia is an age-related loss of accommodation of the human eye that manifests itself as inability to shift focus from distant to near objects. More than 90% of the people over 45 need correction of presbyopia. The conventional corrective lenses (bifocal, trifocal) have been around for more than 200 years and have some drawbacks. They have a limited field of view for each vision task, requiring user to gaze down to accomplish near vision and in some cases causing dizziness and discomfort. Some users need three different eyeglasses for reading, computer, and driving. Progressive lenses cause some distortion. Recently we have demonstrated switchable diffractive liquid crystal (LC) lens with binary ON and OFF states. In the proposed project, our goal is to develop a tunable, low-cost electro-optic lens with continuous focusing powers and high optical performance for near-, intermediate-, and distance vision. The whole aperture with the same power is used for each vision task. Such a device may have revolutionary impact on the field of vision care. Existing LC lenses have an aperture of 10-15 mm, and the power can only be switched between plano and 1 diopter (D) (or 2D). The driver box is 4¿4¿2 cm3, which is bulky. They are not suitable for practical ophthalmic applications. In this study, we will develop a novel, high performance, cost-effective varifocal LC lens with a compact electronic driver and controller. The focusing power of the lens can be continuously tuned from plano to +4D by applied voltages. This range covers the typical add powers needed for presbyopes, and it allows almost all patients to use the same lens. We will fabricate lenses with an aperture around 40mm, which satisfies the requirement for practical applications. The light efficiency will be close to 100%. These three specifications have not been met before. We will design a novel closed-loop driver circuit with good reliability and high power efficiency. In addition, we will develop a minicontroller that allows change of the focus power by simply pressing a button, which is practical and reliable; in the second phase of this project, we will develop a prototype of the eyeglass that allows autofocus function. The size of the driver will be only 5¿5¿2 mm3. Clinical studies will be performed to assess how the wearers function and perceive the new spectacles. This kind of lens is promising to become an alternative of conventional area division multi-focal spectacle lenses used by presbyopes. They may have the potential of revolutionizing the field of presbyopia correction. The new eyeglass will significantly improve the quality of life for a large population. Applications can be extended to fields where varifocal lens elements with low operation voltages, relatively large diameters and fast response time are desirable. For example, a single lens of this kind can be used as a new phoropter to measure the refractive errors and visual acuity and for rapid depth scanning in three-dimensional biomedical imaging. Correction of low vision with high quality optics in the periphery will also have high impact. This would be our next focus of research.

电光自适应眼镜矫正老视 摘要 老花眼是一种与年龄相关的人眼调节能力丧失，表现为 无法将焦点从远处的物体转移到近距离的物体。超过90%的45岁以上的人需要 矫正老花眼。传统的矫正镜片(双焦、三焦)已经 已经有200多年的历史了，也有一些缺点。他们的视野有限 对于每个视觉任务，需要用户向下凝视以完成近视，在某些情况下 引起头晕和不适的。一些用户需要三副不同的眼镜才能阅读， 电脑，还有开车。渐进式镜片会造成一些失真。最近我们有 演示了具有二进制开启和关闭状态的可切换衍射式液晶(LC)镜头。在……里面 提出的项目，我们的目标是开发一种可调、低成本的电光透镜 连续的调焦功率和高光学性能，适用于近、中和 远距离视野。每个视觉任务都使用相同功率的整个光圈。这样的一个 设备可能会对视力护理领域产生革命性的影响。 现有的LC镜片口径为10-15 mm，只能切换功率 在钢琴和1度屈光度(D)(或2D)之间。驱动器盒有4？4？2厘米3，体积很大。他们 不适合实际的眼科应用。在这项研究中，我们将开发一部小说， 高性能、高性价比的变焦LC镜头，配有紧凑型电子驱动器和 控制器。透镜的调焦倍数可以通过以下方式从平面连续调整到+4D 施加的电压。这一范围涵盖了老人所需的典型加法能力，而且它 允许几乎所有患者使用相同的镜片。我们将制造有光圈的透镜 约40 mm，满足实际应用要求。光效 将接近100%。这三种规格以前都没有达到过。我们将设计一个 新颖的闭环驱动电路，可靠性好，电源效率高。此外，我们 将开发一种微型控制器，只需按下一个按钮即可改变聚焦功率 按钮，实用可靠；在这个项目的第二阶段，我们将开发一个 具有自动对焦功能的眼镜原型。驱动程序的大小将仅为 5×5×2mm3。将进行临床研究，以评估佩戴者的功能和 感受一下新的奇观吧。 这种透镜有望成为传统区域划分的替代方案。 老年人使用的多焦点眼镜镜片。他们可能有潜在的 革命性地改变了老花矫正领域。这款新眼镜将显著改进 一大群人的生活质量。应用程序可以扩展到可变焦点的领域 工作电压低、直径较大、响应时间快的透镜元件 都是可取的。例如，这种类型的单个透镜可以用作新的屈光度，以 测量屈光不正和视力，并进行快速深度扫描 三维生物医学成像。用高质量的光学矫正低视力 外围国家也将产生很高的影响。这将是我们下一个研究的重点。