大焦深人工晶体的设计

饶丰

doi:10.3788/CO.20120505.0485

大焦深人工晶体的设计

doi: 10.3788/CO.20120505.0485

饶丰^,

江苏检验检疫车辆灯具检测实验室, 江苏丹阳 212300

基金项目:

国家自然科学基金资助项目(No.60438030,No.60777011);江苏检验检疫基金资助项目(No.2011KJ24)

详细信息

通讯作者:
饶丰

中图分类号: O435.2;R776
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出版历程
- 收稿日期: 2012-06-12
- 修回日期: 2012-08-15
- 刊出日期: 2012-10-10

Design of multi-focus intraocular lenses

RAO Feng^,

Vehicle Lamp Testing Laboratory of Jiangsu Inspection and Quarantine, Danyang 212300, China

摘要

摘要: 运用Zemax光学设计软件构建Liou-Brennan眼模型,设计了增大焦深的非球面、折射型多焦点和衍射型多焦点人工晶体,并用点列图和视锐度分析了所设计的人工晶体的光学质量。对于非球面人工晶体,在3 mm瞳孔下,当人眼无球差时,最佳视锐度相当高,但焦深仅为1.4 m-1;当人眼球差为0.4时,最佳视锐度可达0.9,焦深达2.2 m-1,同时在整个焦深范围内视觉质量均优越。对于衍射型和折射型多焦点人工晶体,在明视条件下,虽然视远和视近时视觉质量良好,但是中间距离的视锐度0.5。衍射型多焦点人工晶体只有81%的光能用于成像,远近焦点能量均分,且与瞳孔大小无关;折射型多焦点人工晶体的远近焦点能量与瞳孔大小相关。设计的人工晶体均能增大人眼的焦深,但各有优缺点,临床上应该酌情选用。
- 眼视光学 /
- 人工晶体 /
- 焦深 /
- 多焦点 /
- 眼模型
Abstract: The Liou-Brennan eye model is constructed using the optical design software ZEMAX. The Depth of Focus(DOF), extended Intraocular Lenses(IOL) that includes aspherical IOL, refractive multifocal IOL and diffractive multifocus IOL are included in the design. The optical performance of the pseudophakic eye for the designed IOLs is analyzed for both the spot diagram and visual acuity. For the pseudophakic eye with a 3 mm pupil, when the spherical aberration is fully corrected by the aspherical IOL, the best visual acuity reaches 1.2 with a DOF of only 1.4 m-1. When the spherical aberration is 0.4, the best visual acuity is 0.9 with a DOF as high as 2.2 m-1. With the implantation of refractive or diffractive multifocus IOLs, the pseudophakic eye has fairly good distant and near vision, while the intermediate vision is lower than 0.5. Diffractive multifocal IOL allows 81% input energy to image and the energy distribution is not affected by the pupil size. The energy distribution of the refractive multifocal IOL is dependent on the pupil diameter. The aspherical IOL, refractive multifocal IOL and diffractive multifocal IOL can extend DOF after surgery. However, they all have advantages and disadvantages, which should be taken into consideration under clinical conditions.
- ophthalmic optics /
- Intraocular Lenses(IOL) /
- Depth of Focus(DOF) /
- multi-focus /
- eye model

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参考文献(1)

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