Refractive surgery has been shown to induce changes in corneal asphericity. LASIK especially increases coma and spherical-like aberrations in larger myopic treatments. This may partially explain why ...

Applying aspheric treatments to cataract and refractive surgery procedures can significantly reduce spherical aberration and the consequent effects of glare and haloes, improving postoperative visual ...

Zygo is a market leader when it comes to interferometric metrology instrumentation. With two key product lines in that category, Zygo offers an optical profiler and a laser interferometer as well as ...

Most comprehensive and modular series of Shack-Hartmann based wavefront measurement instruments including software allowing for Zernike, MTF and PSF analysis and a variety of display options.

A new imaging technique known as wavefront coding is helping designers to reduce the cost and weight of imaging systems. Andrew Harvey and Gonzalo Muyo look at how the technique is being applied to ...