![]() Spherical aberration generally reduces retinal image contrast and affects visual quality, especially under mesopic conditions. Spherical aberration is included within the high order aberrations, specifically in the group of fourth order aberrations, along with quatrefoil and secondary astigmatism. In an aspherical lens, the rays of light passing through the center do not focus at the same point as the rays passing through the periphery of the lens. The word “aspheric” is used to describe a surface or in this case a lens that does not have a spherical shape. There are multiple intraocular lens options that can correct this aberration, but when and how we should use them is a topic of debate and research in recent years. ![]() Among the high order aberrations that can be corrected with cataract surgery is spherical aberration. This is due to several factors, including problems with the ocular surface, pseudophakic dysphotopsia, and optical aberrations in general.Īlthough low order aberrations (myopia, hyperopia, and regular astigmatism) have a greater impact on vision, high order aberrations also play an important role, especially in patients who are candidates for multifocal lenses. ![]() While it is common to see patients post-cataract surgery with a visual acuity (VA) of 20/20, many patients remain dissatisfied with their quality of vision. ![]() Today the goal of cataract surgery is to provide patients with the best possible quality of vision. By Claudio Orlich, MD ALACCSA shares a recent article on spherical aberrations from one of its contributors ![]()
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