Graduate Program in Electrical Engineering (PPGEE), Federal University of Minas Gerais, Belo Horizonte, Brazil.
Ophthalmic Physiol Opt. 2013 Jul;33(4):427-33. doi: 10.1111/opo.12074.
To present an alternative methodology to characterise intraocular lenses (IOLs) using an optical setup with a Hartmann-Shack wavefront sensor.
The methodology was inspired by the ANSI Z80.30 Standard, which addresses IOL optical properties and test methods, and aims to simplify the procedure to allow complete IOL characterisation with a reduced number of measurement steps.
Seven spherical and three toric IOLs were characterised with the alternative methodology and by commercial equipment. Three spherical IOLs measured with the alternative methodology obtained dioptric spherical errors larger than the tolerance established by the ANSI Z80.30 Standard when compared to the IOLs theoretical designs, probably due to manufacturing deviations. All cylindrical dioptric power measurements were within the Standard tolerance. The longitudinal spherical aberration of the IOLs were measured and 2-dimensional Modulation Transfer Functions (MTF) were calculated in order to complementarily assess manufacturing and design quality.
The alternative methodology allows complete IOL characterisation with a reduced number of steps compared to those required by the Standard ANSI Z80.30, achieving satisfactory results in measurements of IOL dioptric power, spherical aberration, cylindrical power and MTF. Although MTF measurements were not performed with a model eye, they may contain additional relevant information regarding the design of ophthalmic lenses.
提出一种使用带有哈特曼-夏克波前传感器的光学装置来描述人工晶状体（IOL）的替代方法。
该方法的灵感来自于 ANSI Z80.30 标准，该标准涉及 IOL 的光学特性和测试方法，旨在简化程序，允许通过减少测量步骤来完成对完整 IOL 的描述。
使用替代方法和商业设备对 7 个球形和 3 个散光 IOL 进行了描述。与 IOL 的理论设计相比，用替代方法测量的 3 个球形 IOL 获得的屈光球差误差大于 ANSI Z80.30 标准规定的公差，这可能是由于制造偏差所致。所有圆柱屈光力测量均在标准公差范围内。测量了 IOL 的纵向球差，并计算了二维调制传递函数（MTF），以补充评估制造和设计质量。
与 ANSI Z80.30 标准要求的步骤相比，替代方法可以通过减少步骤来完成对完整 IOL 的描述，并且在 IOL 屈光力、球差、圆柱力和 MTF 的测量中取得了令人满意的结果。虽然 MTF 测量不是用模型眼进行的，但它们可能包含有关眼科镜片设计的其他相关信息。
