Zlotnik Alex, Ben Yaish Shai, Yehezkel Oren, Lahav-Yacouel Karen, Belkin Michael, Zalevsky Zeev
Xceed Imaging, Petach-Tikva, Israel.
Opt Lett. 2009 Jul 15;34(14):2219-21. doi: 10.1364/OL.34.002219.
The purpose of this Letter is to design, develop, fabricate, and test in clinical trials a new (to our knowledge) type of contact lenses that provides simultaneous near and distance focused vision for presbyopic subjects, including those with up to 2.00 diopters (D) of regular/irregular astigmatism, as an alternative to multifocal contact lenses. The purpose is obtained by generating an optical pattern on the front surface of contact lenses, capable of extending the depth of focus of lenses by 3.00 D with high visual contrast. The pattern was fabricated on top of contact lenses and tested by the use of an eye simulation as well as in clinical trials. Use of the extended depth of focus contact lens enabled patients to achieve good visual acuity and contrast sensitivity for both distance and near vision without compromising the energy distribution or the visual fields.
本信函的目的是设计、开发、制造一种新的（据我们所知）隐形眼镜，并在临床试验中进行测试。这种隐形眼镜能为老花眼患者提供同时的近距和远距聚焦视力，包括那些有高达2.00屈光度（D）规则/不规则散光的患者，作为多焦点隐形眼镜的替代品。通过在隐形眼镜前表面生成一种光学图案来实现这一目的，该图案能够以高视觉对比度将镜片的焦深扩展3.00 D。该图案制作在隐形眼镜上，并通过眼部模拟以及临床试验进行测试。使用扩展焦深隐形眼镜能使患者在不影响能量分布或视野的情况下，实现良好的远距和近距视力的视力敏锐度和对比敏感度。
