Furlan Walter D, García-Delpech Salvador, Udaondo Patricia, Remón Laura, Ferrando Vicente, Monsoriu Juan A
Departmento de Óptica y Optometría y Ciencias de la Visión, Universitat de València, 46100, Spain.
Ophthalmology Department, Hospital Universitario La Fe, Valencia, 46026, Spain.
J Biophotonics. 2017 Sep;10(9):1110-1114. doi: 10.1002/jbio.201600320. Epub 2017 Jun 21.
A conceptually new type of corneal inlays for a customized treatment of presbyopia is presented. The diffractive inlay consists on a small aperture disc having an array of micro-holes distributed inside the open zones of a Fresnel zone plate. In this way, the central hole of the disc lets pass the zero order diffraction and produces an extension of the depth of far focus of the eye, while the diffracted light through the holes in the periphery produce the near focus. Additionally, the micro-holes in the inlay surface fulfill the essential requirement of allowing the flow of nutrients through it to the cells of the corneal stroma. Theoretical and optical-bench experimental results for the polychromatic axial Point Spread Function (PSF) were obtained, showing an improved performance compared to the small aperture corneal inlay currently in the market (Kamra). Images of a test object, obtained at several vergences in the surroundings of the far and near foci, are also shown. Picture: Simulation of the appearance of the Diffractive corneal inlay on a real eye.
本文介绍了一种概念全新的用于老视定制治疗的角膜镶嵌物。这种衍射镶嵌物由一个小孔径圆盘组成，圆盘上有一系列微孔分布在菲涅耳波带片的开放区域内。通过这种方式，圆盘的中心孔允许零级衍射光通过，并延长了眼睛远焦点的深度，而通过周边孔的衍射光则产生近焦点。此外，镶嵌物表面的微孔满足了营养物质通过它流向角膜基质细胞的基本要求。获得了多色轴向点扩散函数（PSF）的理论和光学平台实验结果，与目前市场上的小孔径角膜镶嵌物（Kamra）相比，性能有所提高。还展示了在远焦点和近焦点周围几个聚散度下获得的测试物体图像。图片：衍射角膜镶嵌物在真实眼睛上的外观模拟。
