What percentage of the eye's vision is accounted for by higher order aberrations?

Higher order aberrations are optical imperfections in the eye that can cause visual distortions that are not present in lower order aberrations. These higher order aberrations include a variety of complex optical errors, such as spherical aberration, coma, and trefoil, which can significantly impact visual quality, especially in conditions of low light or high-contrast environments.

The accepted understanding in the field is that higher order aberrations can account for approximately 20% of the overall vision in the human eye. This percentage highlights the importance of not only correcting lower order aberrations (such as myopia, hyperopia, and astigmatism) but also addressing higher order aberrations in order to achieve optimal visual performance.

Understanding this aspect of visual optics is crucial for practitioners, as it influences decisions related to procedures like LASIK or the design of corrective lenses. The focus on both lower and higher order aberrations is fundamental for achieving the best possible visual outcomes for patients.