Search

The diffraction efficiency of conventional diffractive lenses is typically analyzed using the complex Fourier series expansion coefficients. While conventional diffractive lenses typically target high diffraction efficiency in a single diffractive order, applications such as multifocal intraocular lenses seek high diffraction efficiency in multiple diffractive orders. Here, the complex Fourier series technique is generalized to handle these multifocal lenses, and applied to a novel trifocal intraocular lens design.

In this study,which also provides an assessment of machine performance, IOL optimization of aspheric surfaces, using the conic constant factor, has been selected. Such surfaces are easily machined by most software-driven lathes, such as DAC 2- and 4-axis lathes, which were utilized for this study. Measuring tilt and decentration performances on the optimized aspheric lenses, it is shown that 'best shape' IOLs scan be produced using a broad range of lens designs. This promises to increase manufacturer and surgeon confidence in maximizing patients' visual acuity with better contrast sensitivity using aspheric designs.